Update app.py

app.py

@@ -66,7 +66,7 @@ PDF CONTENT:
 Answer the user's questions only based on the PDF content above. If the answer cannot be found in the PDF, politely state that the information is not available in the provided document."""
 
         messages= [
-            {"role": "system", "content": system_message}
+            {"role": "system", "content": system_message},
         ]
         for h_user , h_bot in history:
             messages.append({"role": "user", "content": h_user})