Answer message added

Integrated new message object.

app.py

@@ -66,13 +66,18 @@ async def main(message):
         logger.info(f"Received message: {message}")
         response = await cl.make_async(query_engine.query)(message)
         response_message = cl.Message(content="")
-        
+
+        # Logic to prepare answer and source_elements
         for token in response.response_gen:
             await response_message.stream_token(token=token)
 
         if response.response_txt:
             response_message.content = response.response_txt
 
+        # Integrated new message object
+        if answer: # conditional to when is not None
+            await cl.Message(content=answer, elements=source_elements).send()
+        
         await response_message.send()
         logger.info(f"Response sent: {response.response_txt}")