added introductory prompt

backend.py

@@ -145,8 +145,8 @@ def handle_query(query_str: str,
                 outputs.append(token)
                 print(f"Generated token: {token}")
                 
-                streamed_response = "".join(outputs)
-                yield CompletionResponse(text=streamed_response, delta=token)
+                #yield "".join(outputs)
+                yield CompletionResponse(text=outputs, delta=token)
 
         """if sources:
             sources_str = ", ".join(sources)