You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to change my existing reservation, my music concert got postponed. Can you please help me out with that?

ASSISTANT: Sure, may I know your name to check the reservation status?

USER: Thank you for accepting my request, I have reserved it on the name of Deborah Davis.

ASSISTANT: Please wait, I will check the reservation on your name and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! I think the ticket was not reserved properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.