You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Gregory Perez.

ASSISTANT: Please be on hold for a while.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for choosing us.