input: Write a function to implement a chatbot that can provide customer support in a restaurant based on the user's question stored in a text file. The chatbot should read the user's question from 'random_user_question.txt', choose a random response from a predefined list of possible responses, and print that response. If the file does not exist or is empty, the function should return "No question asked.".
  assert provide_restaurant_support("What meals do you serve?") in [
   '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?',
   'We have a unique selection of meals - have you checked out our menu?'
  ]
  assert provide_restaurant_support("") == "No question asked."
  assert provide_restaurant_support("What are your opening hours?") == "No question asked."
output: import random
  
  def provide_restaurant_support():
      try:
          with open('random_user_question.txt', 'r') as file:
              question = file.read().strip()
              if not question:
                  return "No question asked."
              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?',
                  'We have a unique selection of meals - have you checked out our menu?'
              ]
              return random.choice(responses)
      except FileNotFoundError:
          return "No question asked."