Update app.py

app.py

@@ -418,7 +418,7 @@ Context:
 Initial Response:
 {initial_response}
 
-Please validate the initial response against the provided context. Remove any hallucinations, irrelevant, or factually incorrect information. Generate a revised response that is accurate and directly supported by the context. If any information cannot be verified from the context, state that explicitly.
+Please validate the initial response against the provided context. Remove any hallucinations, irrelevant, or factually incorrect information. Generate a revised response that is accurate and directly supported by the context. If any information cannot be verified from the context, state that explicitly. Lastly after writing the revised response, please provide a list of sources used in your response
 
 Revised Response:
 """