You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you now?

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 good name please?

USER: I am Samuel Wright.

ASSISTANT: Ok, please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

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

USER: Ok, thank you.

ASSISTANT: Thanks for reaching us, have a great day.