You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Will you be my helping hand in changing my reservation as the meeting which I have scheduled to attend got postponed?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Let me know your name to check the previous reservation.

USER: I am Gary Lee.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name to proceed for modification.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for approaching us.