added an if-statement for ending loop

Instead of pressing Ctrl+c to end program. It is easier and less messy for ending chatbot

you/README.md

@@ -25,7 +25,8 @@ chat = []
 
 while True:
     prompt = input("You: ")
-
+    if prompt == 'q':
+        break
     response = you.Completion.create(
         prompt=prompt,
         chat=chat)