input: Write a python function to simulate a basic chatbot that gives random responses to user input.
  assert chatbot_response("How are you?") in ["That's a great question!", "I'm not sure, but I'll try to find out!", "That sounds interesting, tell me more!", "I have no idea, sorry!"]
  assert chatbot_response("Tell me a joke.") in ["That's a great question!", "I'm not sure, but I'll try to find out!", "That sounds interesting, tell me more!", "I have no idea, sorry!"]
  assert chatbot_response("What is the weather like today?") in ["That's a great question!", "I'm not sure, but I'll try to find out!", "That sounds interesting, tell me more!", "I have no idea, sorry!"]
output: import random
  
  def chatbot_response(user_input):
      responses = [
          "That's a great question!",
          "I'm not sure, but I'll try to find out!",
          "That sounds interesting, tell me more!",
          "I have no idea, sorry!"
      ]
      return random.choice(responses)