update prompt

app.py

@@ -806,7 +806,8 @@ Observation: the result of the action
 Thought: I now know the final answer
 Final Answer: the final answer to the original input question"""
 
-FORMAT_INSTRUCTIONS_3 = """To use a tool, please use the following format:
+FORMAT_INSTRUCTIONS_3 = """To use a tool, you must define 'Action' and 'Action Input'.
+please use the following format:
 '''
 Thought: you should always think about what to do
 Action: the action to take, should be one of [{tool_names}]
@@ -821,10 +822,7 @@ Final Answer: the final answer to the original input question
 '''
 """
 
-
-
 SUFFIX = """
-When it is necessary to use tools, you must define 'Action', 'Action Input'. 
 Begin!
 
 Request: {input}