input: Write a function to implement a chatbot that provides customer support in a restaurant. The function should read a user's question from 'random_user_question.txt', select a random response from a list of possible answers, and print the response. The function should handle cases where the file is empty by printing a default message.
  assert restaurant_chatbot('What meals do you serve?', active_response=True)=="We serve a variety of dishes - from salads to pizzas to steaks!"
  assert restaurant_chatbot('What drinks do you have?', active_response=True)=="Check out our menu for a full list of options"
  assert restaurant_chatbot('Do you have vegetarian options?', active_response=True)=="We serve a variety of dishes, including traditional Italian, Mexican, and American fare. What would you like to try?"
  assert restaurant_chatbot('What is your most popular dish?', active_response=True)=="We have a great selection of meals! What kind of dish are you looking for?"
  assert restaurant_chatbot('', active_response=False) == "No question provided."
output: import random
  
  def restaurant_chatbot(user_question, active_response=True):
      if active_response:
          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 great selection of meals! What kind of dish are you looking for?"
          ]
          if user_question:
              return random.choice(responses)
          else:
              return "No question provided."
      else:
          return "No question provided."