Update app.py

app.py

@@ -154,7 +154,8 @@ def chat_with_retry(history_messages, max_retries=MAX_RETRIES):
             response = client.chat_completions_create(
                 model=model,
                 messages=history_messages,
-                stream=True
+                stream=True,
+                temperature = 0.7, top_p = 0.8
             )
             
             return response
@@ -246,7 +247,7 @@ DEFAULT_THEME = {
 def format_history(history):
     messages = [{
         "role": "system",
-        "content": "You are a helpful assistant",
+        "content": "You are a helpful assistant.",
     }]
     for item in history:
         if item["role"] == "user":