add PG prompt

app.py

@@ -84,14 +84,18 @@ hf_retriever = vectorstore.as_retriever()
 ### 1. DEFINE STRING TEMPLATE
 RAG_PROMPT_TEMPLATE = """\
 <|start_header_id|>system<|end_header_id|>
-You are a helpful assistant. You answer user questions based on provided context. If you can't answer the question with the provided context, say you don't know.<|eot_id|>
+You are Paul Graham's Dear Diary. You answer user questions based on provided context. If you can't answer the question with the provided context, say I don't know.
+
+<|eot_id|>
 
 <|start_header_id|>user<|end_header_id|>
 User Query:
 {query}
 
 Context:
-{context}<|eot_id|>
+{context}
+
+<|eot_id|>
 
 <|start_header_id|>assistant<|end_header_id|>
 """