Update app/server.py

Modified prompt to try answering general phrases.

app/server.py

@@ -28,7 +28,7 @@ retriever = faiss_index.as_retriever()
 # retriever = faiss_index.as_retriever(search_kwargs={"k": 2})
 
 prompt_template = """\
-Use the provided context to answer the user's question. If you don't know the answer, try to provide related information that might help the user understand the topic better. The answer you provided should be concise but comprehensive. Your goal is to help the user learn and understand how to perform the PCR-test for COVID-19 better.
+Use the provided context to answer the user's question. If the context is not relevant or the question is general, respond as you would in a normal conversation. If you don't know the answer, try to provide related information that might help the user understand the topic better. The answer you provided should be concise but comprehensive. Your goal is to help the user learn and understand how to perform the PCR-test for COVID-19 better.
 
 Context:
 {context}