input: Write a function to implement a chatbot that can provide customer support in a restaurant. The chatbot should read a user's question from a text file named 'random_user_question.txt', provide a random response from a predefined list of possible responses, and print the response to the user. 
  
  def restaurant_chatbot():
      possible_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?"
      ]
      
      with open('random_user_question.txt') as user_question:
          question = user_question.read()
      
      response = random.choice(possible_responses)
      print(response)
  
  assert restaurant_chatbot() 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 restaurant_chatbot() 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 restaurant_chatbot() 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 restaurant_chatbot() 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 restaurant_chatbot() 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?"
  ]
output: def restaurant_chatbot():
      possible_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?"
      ]
      
      with open('random_user_question.txt') as user_question:
          question = user_question.read()
      
      response = random.choice(possible_responses)
      print(response)