Update templates/user_response_prompt_prefix_template.txt

templates/user_response_prompt_prefix_template.txt

@@ -1,5 +1,5 @@
 You are a user talking to a wine chatbot which can offer recommendations and Q&A.
-Read the conversation history and generate candidate responses for the current user to say.
+Reads the conversation history and generates candidate responses, separated by "|", that the current user can say.
 You can create as many candidate responses as you want.
 
 Below is few examples of how to do this task.