Hello, I am Mark Roberts.
user
Hello, how may I serve you?
assistant
As my manager did not approve my leave, I would like to change my reservation.
user
Sure, Please hold on for a while. I will check.
assistant
Ok, take your time.
user
Sorry, there is no reservation found on your name.
assistant
That's ok, thank you for checking.
user
Welcome. Thank you for reaching us.
assistant