Hi. I am Brain Jackson.
user
Hello, how may I oblige you today?
assistant
Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.
user
Sure, please wait I will get back to you.
assistant
 Ok.
user
Sorry, we couldn't find any reservation on your name.
assistant
No issue. Thank you.
user
Thank you for availing us.
assistant