input: Write a function to implement a chatbot in Python that can provide customer support in a restaurant by reading a user's question from a file named 'random_user_question.txt', selecting a random response from a predefined list of possible answers, and displaying the response to the user.
  assert check_output("What meals do you serve?") == "We serve a variety of dishes - from salads to pizzas to steaks!"
  assert check_output("What kind of food do you have?") == "Check out our menu for a full list of options"
  assert check_output("Do you serve vegetarian options?") == "We serve a variety of dishes, including traditional Italian, Mexican, and American fare. What would you like to try?"
  assert check_output("What's on the menu?") == "We have a unique selection of meals - have you checked out our menu?"
  assert check_output("") == "We have a great selection of meals! What kind of dish are you looking for?"
output: def check_output(question):
      responses = [
          "We serve a variety of dishes - from salads to pizzas to steaks!",
          "Check out our menu for a full list of options",
          "We serve a variety of dishes, including traditional Italian, Mexican, and American fare. What would you like to try?",
          "We have a unique selection of meals - have you checked out our menu?",
          "We have a great selection of meals! What kind of dish are you looking for?"
      ]
      if question == "":
          return responses[4]
      else:
          return responses[0]