update pormpt 2

app.py

@@ -378,7 +378,7 @@ Text To Sound: Useful when you need to convert text into sound file."""
 
 PREFIX = """Answer the following questions as best you can with detail information and explanation. 
 You can always use tools to convert text to sound.
-You must always check internal vector database first and try to answer the question based on the information in vector database only.
+You must always check vector database first and try to answer the question based on the information 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:"""