diff --git a/lib/Controller/Errors.php b/lib/Controller/Errors.php
index 7fcb2d6..2a62076 100644
--- a/lib/Controller/Errors.php
+++ b/lib/Controller/Errors.php
@@ -3,6 +3,7 @@
 namespace OCA\UPschooling\Controller;
 
 use Closure;
+use OCA\UPschooling\Exceptions\RoomNotFoundException;
 use OCA\UPschooling\Exceptions\TicketNotFoundException;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
@@ -11,9 +12,9 @@ trait Errors {
 	protected function handleNotFound(Closure $callback): DataResponse {
 		try {
 			return new DataResponse($callback());
-		} catch (TicketNotFoundException $e) {
-			$message = ['message' => $e->getMessage()];
-			return new DataResponse($message, Http::STATUS_NOT_FOUND);
+		} catch (TicketNotFoundException|RoomNotFoundException $e) {
+			$result = $e->getResult();
+			return new DataResponse($result->getMeta(), $result->getStatusCode());
 		}
 	}
 }
diff --git a/lib/Controller/TicketApiController.php b/lib/Controller/TicketApiController.php
index 1cf7bc5..127c5da 100644
--- a/lib/Controller/TicketApiController.php
+++ b/lib/Controller/TicketApiController.php
@@ -4,13 +4,14 @@ namespace OCA\UPschooling\Controller;
 
 use OCA\UPschooling\AppInfo\Application;
 use OCA\UPschooling\Db\TicketMapper;
+use OCA\UPschooling\Exceptions\RoomNotFoundException;
+use OCA\UPschooling\Service\ChatService;
 use OCA\UPschooling\Service\MatrixService;
 use OCA\UPschooling\Service\TicketService;
 use OCP\AppFramework\ApiController;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\IRequest;
 use Psr\Log\LoggerInterface;
-use Punic\Data;
 
 class TicketApiController extends ApiController
 {
@@ -24,6 +25,9 @@ class TicketApiController extends ApiController
 	/** @var MatrixService */
 	private $matrixService;
 
+	/** @var ChatService */
+	private $chatService;
+
 	/** @var TicketMapper */
 	private $ticketMapper;
 
@@ -38,6 +42,7 @@ class TicketApiController extends ApiController
 		TicketService   $ticketService,
 		TicketMapper    $ticketMapper,
 		MatrixService   $matrixService,
+		ChatService     $chatService,
 		string          $userId
 	) {
 		parent::__construct(Application::APP_ID, $request);
@@ -45,6 +50,7 @@ class TicketApiController extends ApiController
 		$this->ticketService = $ticketService;
 		$this->ticketMapper = $ticketMapper;
 		$this->matrixService = $matrixService;
+		$this->chatService = $chatService;
 		$this->userId = $userId;
 	}
 
@@ -74,9 +80,12 @@ class TicketApiController extends ApiController
 		return $this->handleNotFound(function () use ($id) {
 			$matrixUser = $this->ticketService->getOrCreateUser($this->userId);
 			$ticket = $this->ticketMapper->findForUser($id, $matrixUser);
-			$this->logger->debug("fetchChat found matrix data for room " . $ticket->getMatrixRoom());
+			$this->logger->debug("fetchChat found matrix data for ticket " . print_r($ticket->jsonSerialize(), true));
+			// returns 404 RoomNotFoundException if no room could/should be created
+			$chatRoom = $this->chatService->getOrCreateChatRoom($ticket);
+			$this->logger->debug("fetchChat got chat room " . print_r($chatRoom->jsonSerialize(), true));
 			return array(
-				'matrixRoom' => $ticket->getMatrixRoom(), // FIXME: wrong room, create one for helper and user
+				'matrixChatRoom' => $chatRoom->getMatrixRoomId(),
 				'matrixAccessToken' => $matrixUser->getMatrixToken(),
 				'matrixServerUrl' => $this->matrixService->getServerUrl(),
 			);
diff --git a/lib/Db/ChatMapper.php b/lib/Db/ChatMapper.php
new file mode 100644
index 0000000..99425e6
--- /dev/null
+++ b/lib/Db/ChatMapper.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace OCA\UPschooling\Db;
+
+use Doctrine\DBAL\Types\Type;
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Db\Entity;
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class ChatMapper extends QBMapper
+{
+	public function __construct(IDBConnection $db)
+	{
+		parent::__construct($db, 'upschooling_chats', MatrixChat::class);
+	}
+
+	/**
+	 * @param int $ticketId
+	 * @return array array of Entity|MatrixChat
+	 */
+	public function findForTicket(int $ticketId): array
+	{
+		/* @var $qb IQueryBuilder */
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from('upschooling_chats')
+			->where($qb->expr()->eq('ticket_id', $qb->createNamedParameter($ticketId, IQueryBuilder::PARAM_INT)));
+		return $this->findEntities($qb);
+	}
+
+	/**
+	 * @param int $ticketId
+	 * @return Entity|MatrixChat
+	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
+	 * @throws DoesNotExistException
+	 */
+	public function findCurrent(int $ticketId): MatrixChat
+	{
+		/* @var $qb IQueryBuilder */
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from('upschooling_chats')
+			->where(
+				$qb->expr()->eq('ticket_id', $qb->createNamedParameter($ticketId, IQueryBuilder::PARAM_INT)),
+				$qb->expr()->isNull('end_date')
+			);
+		return $this->findEntity($qb);
+	}
+
+	/**
+	 * @param \DateTime $dateTime
+	 * @return mixed The database representation of the datetime with timezone.
+	 * @throws \Doctrine\DBAL\Exception
+	 * @throws \Doctrine\DBAL\Types\ConversionException
+	 */
+	public function convertDateTimeTz(\DateTime $dateTime)
+	{
+		$dateTimeTzType = Type::getType("datetimetz");
+		return $dateTimeTzType->convertToDatabaseValue($dateTime, $this->db->getDatabasePlatform());
+	}
+}
diff --git a/lib/Db/MatrixChat.php b/lib/Db/MatrixChat.php
new file mode 100644
index 0000000..af0248c
--- /dev/null
+++ b/lib/Db/MatrixChat.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace OCA\UPschooling\Db;
+
+use JsonSerializable;
+use OCP\AppFramework\Db\Entity;
+
+class MatrixChat extends Entity implements JsonSerializable
+{
+	protected $ticketId;
+	protected $matrixRoomId;
+	protected $matrixHelperUser;
+	protected $dateStart;
+	protected $dateEnd;
+	protected $version;
+
+	public function jsonSerialize(): array
+	{
+		return [
+			'id' => $this->id,
+			'ticketId' => $this->ticketId,
+			'matrixRoomId' => $this->matrixRoomId,
+			'matrixHelperUser' => $this->matrixHelperUser,
+			'dateStart' => $this->dateStart,
+			'dateEnd' => $this->dateEnd,
+			'version' => $this->version,
+		];
+	}
+}
diff --git a/lib/Migration/Version000000Date20210918151800.php b/lib/Migration/Version000000Date20210918151800.php
index fe154af..12db8be 100644
--- a/lib/Migration/Version000000Date20210918151800.php
+++ b/lib/Migration/Version000000Date20210918151800.php
@@ -55,30 +55,61 @@ class Version000000Date20210918151800 extends SimpleMigrationStep {
 			$table->addIndex(['matrix_control_room'], 'upschooling_mx_room_id_idx');
 		}
 
-        if (!$schema->hasTable('upschooling_users')) {
-            $table = $schema->createTable('upschooling_users');
-            $table->addColumn('id', 'integer', [
-                'autoincrement' => true,
-                'notnull' => true,
-            ]);
-            $table->addColumn('user_id', 'string', [
-                'notnull' => true,
-                'length' => 64,
-            ]);
-            $table->addColumn('matrix_user', 'string', [
-                'notnull' => true,
-                'length' => 200,
-            ]);
-            $table->addColumn('matrix_token', 'string', [
-                'notnull' => true,
-                'length' => 200,
-            ]);
+		if (!$schema->hasTable('upschooling_users')) {
+			$table = $schema->createTable('upschooling_users');
+			$table->addColumn('id', 'integer', [
+				'autoincrement' => true,
+				'notnull' => true,
+			]);
+			$table->addColumn('user_id', 'string', [
+				'notnull' => true,
+				'length' => 64,
+			]);
+			$table->addColumn('matrix_user', 'string', [
+				'notnull' => true,
+				'length' => 200,
+			]);
+			$table->addColumn('matrix_token', 'string', [
+				'notnull' => true,
+				'length' => 200,
+			]);
 
-            $table->setPrimaryKey(['id']);
-            $table->addUniqueConstraint(['user_id'], 'upschooling_mx_user_nc_uniq');
-            $table->addUniqueConstraint(['matrix_user'], 'upschooling_mx_user_mx_uniq');
-            $table->addForeignKeyConstraint('users', ['user_id'], ['uid'], [], 'upschooling_mx_user_nc_fk');
-        }
+			$table->setPrimaryKey(['id']);
+			$table->addUniqueConstraint(['user_id'], 'upschooling_mx_user_nc_uniq');
+			$table->addUniqueConstraint(['matrix_user'], 'upschooling_mx_user_mx_uniq');
+			$table->addForeignKeyConstraint('users', ['user_id'], ['uid'], [], 'upschooling_mx_user_nc_fk');
+		}
+
+		if (!$schema->hasTable('upschooling_chats')) {
+			$table = $schema->createTable('upschooling_chats');
+			$table->addColumn('id', 'integer', [
+				'autoincrement' => true,
+				'notnull' => true,
+			]);
+			$table->addColumn('ticket_id', 'integer', [
+				'notnull' => true,
+			]);
+			$table->addColumn('matrix_room_id', 'string', [
+				'notnull' => true,
+				'length' => 200,
+			]);
+			$table->addColumn('matrix_helper_user', 'string', [
+				'notnull' => true,
+				'length' => 200,
+			]);
+			$table->addColumn('date_start', 'datetimetz', [
+				'notnull' => true,
+			]);
+			$table->addColumn('date_end', 'datetimetz', [
+				'notnull' => false,
+			]);
+			$table->addColumn('version', 'integer', [
+				'notnull' => true,
+			]);
+
+			$table->setPrimaryKey(['id']);
+			$table->addForeignKeyConstraint('upschooling_tickets', ['ticket_id'], ['id'], [], 'upschooling_tckt_id_fk');
+		}
 		return $schema;
 	}
 }
diff --git a/lib/Service/ChatService.php b/lib/Service/ChatService.php
new file mode 100644
index 0000000..b8ae747
--- /dev/null
+++ b/lib/Service/ChatService.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace OCA\UPschooling\Service;
+
+use Aryess\PhpMatrixSdk\Room;
+use OCA\UPschooling\Db\ChatMapper;
+use OCA\UPschooling\Db\MatrixChat;
+use OCA\UPschooling\Db\MatrixTicket;
+use OCA\UPschooling\Db\TicketMapper;
+use OCA\UPschooling\Exceptions\RoomNotFoundException;
+use OCP\AppFramework\Db\DoesNotExistException;
+use Psr\Log\LoggerInterface;
+
+class ChatService
+{
+
+	/** @var ChatMapper */
+	private $chatMapper;
+
+	/** @var MatrixService */
+	private $matrixService;
+
+	/** @var LoggerInterface */
+	private $logger;
+
+	public function __construct(ChatMapper $chatMapper, MatrixService $matrixService, LoggerInterface $logger)
+	{
+		$this->chatMapper = $chatMapper;
+		$this->matrixService = $matrixService;
+		$this->logger = $logger;
+	}
+
+	/**
+	 * @param $ticket MatrixTicket Support ticket
+	 * @throws RoomNotFoundException
+	 */
+	public function getOrCreateChatRoom(MatrixTicket $ticket): MatrixChat
+	{
+		try {
+			return $this->chatMapper->findCurrent($ticket->getId());
+		} catch (DoesNotExistException $e) {
+			if ($ticket->getMatrixHelperUser() == null) {
+				$this->logger->debug("No helper assigned to ticket " . $ticket->getId() . ". Not creating chat room");
+				throw new RoomNotFoundException();
+			}
+			$this->logger->debug("Chat room for ticket " . $ticket->getId() . " does not exist. Creating room..");
+			$roomId = $this->matrixService->createRoom();
+			$startDate = new \DateTime('now', new \DateTimeZone("utc"));
+			$matrixChat = new MatrixChat();
+			$matrixChat->setTicketId($ticket->getId());
+			$matrixChat->setMatrixRoomId($roomId);
+			$matrixChat->setMatrixHelperUser($ticket->getMatrixHelperUser());
+			$matrixChat->setDateStart($this->chatMapper->convertDateTimeTz($startDate));
+			$matrixChat->setVersion(1);
+
+			$this->matrixService->inviteUser($roomId, $ticket->getMatrixHelperUser());
+			$this->matrixService->inviteUser($roomId, $ticket->getMatrixAssistedUser());
+
+			return $this->chatMapper->insert($matrixChat);
+		}
+	}
+}
diff --git a/lib/Service/MatrixService.php b/lib/Service/MatrixService.php
index 02dba1c..28a0552 100644
--- a/lib/Service/MatrixService.php
+++ b/lib/Service/MatrixService.php
@@ -255,4 +255,10 @@ class MatrixService
 			$this->logger->debug("No ratelimiting for " . $this->superuser);
 		}
 	}
+
+	public function inviteUser(string $roomId, string $matrixUserId)
+	{
+		$room = $this->client->joinRoom($roomId);
+		$room->inviteUser($matrixUserId);
+	}
 }
diff --git a/lib/Service/TicketService.php b/lib/Service/TicketService.php
index c7a0ff7..b96fada 100644
--- a/lib/Service/TicketService.php
+++ b/lib/Service/TicketService.php
@@ -15,6 +15,7 @@ use OCA\UPschooling\Exceptions\TicketNotFoundException;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Db\MultipleObjectsReturnedException;
 use OCP\IUserManager;
+use Psr\Log\LoggerInterface;
 
 class TicketService {
 
@@ -30,16 +31,21 @@ class TicketService {
 	/** @var UserMapper */
 	private $userMapper;
 
+	/** @var LoggerInterface */
+	private $logger;
+
 	public function __construct(
 		IUserManager $userManager,
 		MatrixService $matrix,
 		TicketMapper $ticketMapper,
-		UserMapper $userMapper
+		UserMapper $userMapper,
+		LoggerInterface $logger
 	) {
 		$this->userManager = $userManager;
 		$this->matrix = $matrix;
 		$this->ticketMapper = $ticketMapper;
 		$this->userMapper = $userMapper;
+		$this->logger = $logger;
 	}
 
 	public function findAll(string $userId): array {
@@ -83,6 +89,7 @@ class TicketService {
 	}
 
 	public function assign($id, $userId): array{
+		$this->logger->debug("Assigning $userId to ticket $id..");
 		$matrixUser = $this->getOrCreateUser($userId);
 		$ticket = $this->ticketMapper->findTicket($id);
 		$roomID = $ticket->getMatrixControlRoom();
diff --git a/src/Ticket.vue b/src/Ticket.vue
index c779a85..572b7f2 100644
--- a/src/Ticket.vue
+++ b/src/Ticket.vue
@@ -27,6 +27,7 @@
 </template>
 
 <script>
+
 import KeyValueTable from './components/KeyValueTable'
 import axios from '@nextcloud/axios'
 
@@ -50,13 +51,24 @@ export default {
 		/** @type {HTMLIFrameElement} */
 		const elementWebFrame = document.getElementById('element-web-frame')
 		this.loadChat(elementWebFrame).catch((err) => {
-			console.error('Could not load Element Web in iframe', err)
-			elementWebFrame.src = 'about:blank'
-			elementWebFrame.onload = function() {
-				const textElement = elementWebFrame.contentDocument.createElement('strong')
-				textElement.innerText = 'Element Web konnte nicht geladen werden.'
-				elementWebFrame.contentDocument.body.appendChild(textElement)
-				elementWebFrame.onload = undefined
+			if (err.message === 'Room not found') {
+				console.debug('No chat room assigned to ticket')
+				elementWebFrame.src = 'about:blank'
+				elementWebFrame.onload = function() {
+					const textElement = elementWebFrame.contentDocument.createElement('strong')
+					textElement.innerText = 'Textchat nicht verfügbar. Es ist noch kein Helfer zugewiesen.'
+					elementWebFrame.contentDocument.body.appendChild(textElement)
+					elementWebFrame.onload = undefined
+				}
+			} else {
+				console.error('Could not load Element Web in iframe', err)
+				elementWebFrame.src = 'about:blank'
+				elementWebFrame.onload = function() {
+					const textElement = elementWebFrame.contentDocument.createElement('strong')
+					textElement.innerText = 'Element Web konnte nicht geladen werden.'
+					elementWebFrame.contentDocument.body.appendChild(textElement)
+					elementWebFrame.onload = undefined
+				}
 			}
 		})
 	},
@@ -77,8 +89,11 @@ export default {
 		async loadChat(elementWebFrame) {
 			const matrixInfoResponse = await axios.get(
 				`api/v1/tickets/${this.ticket.ticketId}/chat`,
-				{ headers: { Accept: 'application/json' } },
+				{ headers: { Accept: 'application/json' }, validateStatus: status => status === 200 || status === 404 },
 			)
+			if (matrixInfoResponse.status === 404 && matrixInfoResponse.data.message === 'Room not found') {
+				throw Error(matrixInfoResponse.data.message)
+			}
 			if (matrixInfoResponse.status !== 200) {
 				throw Error(`Received unexpected status code ${matrixInfoResponse.status} for fetching matrix chat data`)
 			}
@@ -113,15 +128,12 @@ export default {
 			// load Element Web
 			elementWebFrame.src = '/upschooling/element-web/'
 
-			loginPromise.then(() => {
-				console.warn('LOGGED IN')
-				elementWebFrame.contentWindow.mxDispatcher.dispatch({
-					action: 'view_home_page',
-					justRegistered: false,
-				})
+			loginPromise.then(async () => {
+				const matrixClient = elementWebFrame.contentWindow.mxMatrixClientPeg.get()
+				await matrixClient.joinRoom(matrixInfoResponse.data.matrixChatRoom)
 				elementWebFrame.contentWindow.mxDispatcher.dispatch({
 					action: 'view_room',
-					room_id: matrixInfoResponse.data.matrixRoom,
+					room_id: matrixInfoResponse.data.matrixChatRoom,
 				})
 			}).catch(console.error)
 		},