Hi.
user
Hello. How may I aid you?
assistant
My name is Paul Brown. Please change my existing reservation, as my music concert dates have been postponed to some other dates.
user
Paul, I will help you, please give me a moment. Sorry to inform you that there is no reservation found under your name.
assistant
That's ok, may be my reservation did not done properly.
user
Can I help you with anything else?
assistant
No, thank you for your time.
user
Thank you for reaching us, have a nice day.
assistant