Add system prompts

app.py

@@ -30,7 +30,7 @@ def generate(
     top_k: int = 40,
     repetition_penalty: float = 1.2,
 ) -> Iterator[str]:
-    conversation = []
+    conversation = [{"role": "system", "content": "be concise"}]
     for user, assistant in chat_history:
         conversation.extend([{"role": "user", "content": user}, {"role": "assistant", "content": assistant}])
     conversation.append({"role": "user", "content": message})