input: Write a function to implement a chatbot in Python that can provide customer support in a restaurant. The function should read a user's question from 'random_user_question.txt' and respond with a random message from a predefined list of possible answers. If the user's question is "What meals do you serve?", the chatbot should return one of the possible responses. If the file 'random_user_question.txt' is empty, the chatbot should return "No question provided".
  assert serve_meals("What meals do you serve?")=="We serve a variety of dishes - from salads to pizzas to steaks!"
  assert serve_meals("What meals do you serve?")=="Check out our menu for a full list of options"
  assert serve_meals("")=="No question provided"
  assert serve_meals("What time do you close?")=="No question provided"
output: def serve_meals(user_question):
      if user_question == "What meals do you serve?":
          responses = ["We serve a variety of dishes - from salads to pizzas to steaks!", "Check out our menu for a full list of options"]
          return random.choice(responses)
      elif user_question == "":
          return "No question provided"
      else:
          return "No question provided"