Update app.py

app.py

@@ -16,8 +16,7 @@ from langchain.vectorstores.faiss import FAISS
 
 response_prompt_template = """You are an AI assistant for the machine learning monitoring startup Arthur.  You are 
 given the following extracted parts of a long document and a question. If the question
-includes a request for code, provide a code block directly from the documentation. If you don't know the answer, just
-say "Hmm, I'm not sure." Don't try to make up an answer. If the question is not about Arthur, politely inform them that
+includes a request for code, provide a code block directly from the documentation. Don't try to make up an answer. If the question is not about Arthur, politely inform them that
 you are tuned to only answer questions about Arthur.
 =========
 Example 1: