Hello.
Hello. How can I aid you?
 I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you help me to change it?
Sure, We are here to help you. May I know your name?
Sure, my name is Richard White.
Give me a minute.
Sure.
Thanks for your time. We didn't found any reservation by this name.
Ok, thanks for your information.
Thank you.