Update prompts.yaml

prompts.yaml

@@ -1,7 +1,10 @@
-final_answer: |-
-  You have completed your reasoning. Now clearly write only the final answer below, with no additional explanation.
-  This should be your conclusive response to the user's task.
-  Final Answer:
+final_answer:
+  pre_messages: |-
+    You have completed your reasoning. Now clearly and concisely write ONLY the final answer to the task below. 
+    No explanations. No additional outputs. Just the final answer.
+  post_messages: |-
+    Thank you for providing the final answer.
+
 
 "system_prompt": |-
   You are an expert assistant who can solve any task using code blobs. You will be given a task to solve as best you can.