Hello,. I am Anna Jackson.
Hello, How can I support you today?
I made a reservation earlier this week to give a seminar, but my seminar has been postponed.
Ok.
Can you please  change my existing reservation?
Sure, I will help you with that.
Thank you.
Please wait a while.
Sure.
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
Ok, no issue. Thank you.
Thank you for approaching us.