Update app.py

app.py

@@ -143,7 +143,7 @@ async def handle_message(message: cl.Message):
                 "body": {"booking_id": bestillingskode}
             }
         },
-        callbacks=[cl.AsyncLangchainCallbackHandler()]
+        callbacks=[cl.AsyncLangchainCallbackHandler()])
         
     else:
         response = await llm_chain.acall(user_message, callbacks=[cl.AsyncLangchainCallbackHandler()])