input: Write a python function to create a Chatbot class that responds to user inputs.
  assert chatbot.get_response("hello") == "I don't understand what you're saying."
  assert chatbot.get_response("bye") == "I don't understand what you're saying."
  assert chatbot.name == name
output: class Chatbot:
      def __init__(self, name):
          self.name = name
  
      def get_response(self, user_input):
          return "I don't understand what you're saying."