Hello, I am Frank Martinez.
user
Hello, may I know how best I can help you today?
assistant
As my manager did not approve my leave, I would like to change my recent reservation.
user
Sure, please wait for a while.
assistant
Sure, take your time.
user
 I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
That's ok, thank you for checking.
user
Your welcome.
assistant