Hello.
Hello, how can I aid you today?
 I made a reservation earlier this week to give a seminar, But my seminar has been postponed. Can you do the changes in my reservation?
Sure, may I know your name please?
I am Amanda Taylor.
Please stand by, I will check the reservation list and revert to you.
Ok.
We found no reservation by the name Amanda Taylor.
No problem, Thank you.
Thank you for choosing us.