You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist 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, may I know your name to check the reservation?

USER: Myself Kevin Phillips.

ASSISTANT: Please wait a minute, I will check the reservation and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry to say that there is no reservation found on your name.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for opting us.