Hello.
user
Hello, how may I help you?
assistant
I want to change my reservation as I have booked my ticket with wrong dates, please help me out.
user
Sure, I am here to help you.
assistant
Thank you.
user
Can I know your name please to proceed further?
assistant
I am Frank Collins.
user
Sorry to inform you that there is no active reservation on your given name.
assistant
That's ok, thank you for checking.
user
Thanks for reaching us, have a nice day.
assistant