Update app.py

app.py

@@ -33,7 +33,6 @@ def greet(prompt):
         response = ai.Completion.create(
             engine="text-davinci-003",
             prompt=prompt,
-            promptPrefix= "You are John, a Virtual Assistant developed by AI_Team.You answer as concisely as possible for each response (e.g. Don't be verbose).\n",
             temperature=0,
             max_tokens=2000,
             top_p=1,