ChatBot AI

import random

greetings = ["Hello", "What's up?", "Howdy!"]
goodbyes = ["Bye!", "Goodbye!", "See you soon!"]

keywords = ["music", "pet", "book"]
responses = ["music is ok!", "pets are ok!", "books are ok!"]

print("Bot: " + random.choice(greetings))

while (1):
    text = input("Say sth (or type bye to quit): ").lower()
    if (text == "bye"):
        break

    exists = False
    for index in range(len(keywords)):
        if (keywords[index] in text):
            print("Bot: " + responses[index])
            exists = True

    if (exists == False):
        newKeyword = input("I'm not sure how to respond... Type keyword: ")
        keywords.append(newKeyword)
        newResponse = input("How I should respond to " + newKeyword + "? ")
        responses.append(newResponse)

print(random.choice(goodbyes))