You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you right now?

USER: As my business meeting got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, I am glad to help you with changing and can I know your name for checking purpose?

USER: Myself Brian Thompson.

ASSISTANT: Please allow me a moment to search your name in our booking list.

USER: Ok.

ASSISTANT: Thank you for being on hold, I could not find any flight ticket booking on the respective name in our previous booking list to change it.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: It's my pleasure and thank you for consulting us, have a nice day.