updated refusal_prompt to use chatpromptTemplate

prompts.py

@@ -72,11 +72,16 @@ cleaner_prompt = PromptTemplate(
     template=cleaner_prompt_str,
     input_variables=["kb_answer", "web_answer"]
 )
-
-refusal_prompt = PromptTemplate(
-    template=refusal_prompt_str,
-    input_variables=["topic"]
+refusal_prompt=ChatPromptTemplate(
+    [
+        ("system",refusal_prompt_str),
+        ("user","{topic}")
+    ]
 )
+# refusal_prompt = PromptTemplate(
+#     template=refusal_prompt_str,
+#     input_variables=["topic"]
+# )
 
 # Define function to check if the query contains harmful topics
 def is_harmful(query: str) -> bool: