AI-POWERED-CHATBOT-USING-NLP

import nltk
from nltk.chat.util import Chat, reflections

# Define chatbot responses (patterns and responses)
pairs = [
    (r"hi|hello|hey", ["Hello!", "Hi there!", "Hey!"]),
    (r"how are you?", ["I'm good, how about you?", "I'm doing well, thanks for asking!"]),
    (r"what is your name?", ["I'm a chatbot!", "I am your virtual assistant."]),
    (r"bye|goodbye", ["Goodbye!", "See you soon!", "Take care!"]),
    (r"(.*)", ["I'm sorry, I don't understand.", "Can you rephrase that?"])
]

# Initialize chatbot
chatbot = Chat(pairs, reflections)

# Run chatbot
print("Chatbot: Hello! Type 'bye' to exit.")
while True:
    user_input = input("You: ")
    if user_input.lower() == "bye":
        print("Chatbot: Goodbye!")
        break
    response = chatbot.respond(user_input)
    print(f"Chatbot: {response}")