input: Write a function to create a basic chatbot in Python that responds to casual inquiries with random pre-defined answers. The chatbot should run in an infinite loop until the user inputs "Goodbye", at which point it should terminate with a goodbye message. If the given input is not "Goodbye", the chatbot should respond with one of the random answers from a predefined list.
  assert chatbot_response("What's your name?")=="That's a great question!"
output: import random
  
  def chatbot_response(user_input):
      responses = ["That's a great question!", "I'm not sure about that.", "Interesting, tell me more.", "I see what you're saying."]
      if user_input == "Goodbye":
          return "Goodbye!"
      else:
          return random.choice(responses)