fixing message,

app.py

@@ -82,7 +82,10 @@ def get_motivational_quote():
 
 
 def respond(message, history):
-    messages = [{"role": "system", "content": "You are a big sister chatbot named, Nessie. You help people feel better in a simple manner.", "message" : "3 sentences or less. do not stop mid sentence."}]
+   messages = [{
+    "role": "system", 
+    "content": "You are a big sister chatbot named Nessie. You help people feel better in a simple manner. Always reply in 3 sentences or less. Do not stop mid-sentence."
+}]
     # change the personality
     context = get_top_chunks(message)