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 a file named 'random_user_question.txt', select a random response from a list of possible answers, and print that response. If the file 'random_user_question.txt' does not exist or is empty, the function should print a message indicating that there was no question to respond to.
  assert provide_customer_support()==None
  assert provide_customer_support()==None
  assert provide_customer_support()==None
  assert provide_customer_support()==None
  assert provide_customer_support()==None
output: import random
  
  def provide_customer_support():
      try:
          with open('random_user_question.txt', 'r') as file:
              question = file.read().strip()
              if not question:
                  print("There was no question to respond to.")
              else:
                  responses = ["How can I assist you today?", "What would you like to know?", "How may I help you?", "Is there something specific you're looking for?"]
                  print(random.choice(responses))
      except FileNotFoundError:
          print("There was no question to respond to.")