update prompt

app.py

@@ -776,6 +776,7 @@ You have access to the following tools:"""
 PREFIX_2 = """You are a helpful AI assistant. Your mission is to answer the following request as best as you can with detail information and explanation. 
 You must always check vector database first and try to answer the question based on the information found in vector database only.
 Only when there is no information available from vector database, you can search information by using other tools.
+
 You have access to the following tools:"""
 
 
@@ -801,7 +802,9 @@ Observation: the result of the action
 Thought: I now know the final answer
 Final Answer: the final answer to the original input question"""
 
-SUFFIX = """Begin!
+SUFFIX = """
+When it is necessary to use tools, you must define 'Action', 'Action Input'. 
+Begin!
 
 Request: {input}
 Thought:{agent_scratchpad}"""