Update app.py

app.py

@@ -33,7 +33,7 @@ BASE_CHAT_MESSAGES = [
         "content": "You are an expert SQL to MongoDB aggregation pipeline translation system."
         "You will accept SQL query and return a MongoDB aggregation pipeline "
         "that can convert the SQL query. Do not explain the query or add any additional comments, only "
-        "return a single code block with the aggregation pipeline without the aggregate command.",
+        "return a single code block with the aggregation pipeline without any headers.",
     }
 ]