You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your good name to proceed further?

USER: Myself Frank Williams.

ASSISTANT: Please be on hold. I will check and revert you.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.