Code:)

# Description: This is a chat bot
#import the library
from nltk.chat.util import Chat, reflections
pairs = [
    ['my name is (.*)',['hi %1']],
    ['(hi|hello|hey|hola|hollaa)', ['hey there', 'hi there', 'haayyy']],
    ['(.*) in (.*) is fun', ['%1 in %2 is indeed fun']],
    ['(.*)(location|city) ?', 'Bengaluru, Chennai'],
    ['(.*)created you ?', ['theservermonk using NLTK']],
    ['(.*) is the weather in (.*)', ['the weather in %1 is amazing like always']],
    ['(.*)help(.*)',['I can help you']],
    ['(.*) your name ?', ['my name is ladyPy']]
]
my_dummy_reflections = {
    'go' : 'gone',
    'hello' : 'hey there'
}
chat = Chat(pairs, my_dummy_reflections)
#chat._substitute('go hello')
chat.converse()



Output:


>hi
haayyy
>whats the weather in Chennai?
None
>what is the weather in Chennai?
the weather in what is amazing like always
>who created you
theservermonk using NLTK
>Whats your name?
my name is ladyPy
>can you help me out?
I can help you