responses = {
    "hello": "Hi there! 👋",
    "how are you": "I'm a bot, I'm doing great! 😄",
    "bye": "Goodbye! 👋"
}

def chatbot():
    print("Chatbot is ready! (Type 'bye' to exit)")
    while True:
        user_input = input("You: ").lower()
        if user_input == "bye":
            print("Chatbot: Goodbye! 👋")
            break
        response = responses.get(user_input, "Chatbot: I don't understand that.")
        print(f"Chatbot: {response}")

chatbot()