fix error

app.py

@@ -40,21 +40,24 @@ reflections reveal a change or growth in thinking.
 
 # Function Definitions
 
-def api_calling(prompt):
-    completions = openai.Completion.create(
+def api_calling(history):
+    response = openai.Completion.create(
         engine="text-davinci-003",
-        prompt=prompt,
+        prompt={"messages": history},
         max_tokens=1024,
         n=1,
         stop=None,
         temperature=0.5,
     )
-    message = completions.choices[0].text
+    message = response.choices[0].message['content']
     return message
+
+
     
 
 def message_and_history(input, history):
     history = history or []
+    history.insert(0, {"role": "system", "content": sys_message})
     history.append({"role": "user", "content": input})
 
     # Get chatbot's response