Hello.
Hello, how may I help you?
I want to change my reservation, because my friends are unable to come on our planned date.  So will you help me with changing the ticket?
Sure. May I have your name?
My name is Mark White.
Please hold on for a moment.
Ok.
Sorry Mark. I could not find any reservation on your name.
It's ok, thank you for checking my reservation.
Thank you.