Hello, I am Alexander Miller.
user
Hello, how may I help you at this moment?
assistant
As my manager did not approve my leave, I would like to cancel my recent  reservation.
user
Please wait for a moment.
assistant
Ok, take your time.
user
Sorry Miller, there is no ticket under your name to cancel.
assistant
That's ok, thank you for checking.
user
Thank you for reaching us.
assistant
Welcome.
user