Hello.
user
Hello, how may I help you?
assistant
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?
user
Sure. May I have your name?
assistant
My name is Mark White.
user
Please hold on for a moment.
assistant
Ok.
user
Sorry Mark. I could not find any reservation on your name.
assistant
It's ok, thank you for checking my reservation.
user
Thank you.
assistant