Hello, I am Samuel Taylor.
Hello, how may I serve you at this moment?
As my manager did not approve my leave, I would like to cancel my recent reservation.
Sure, I will help you at this moment. Please wait for a moment. Sorry, there is no reservation existing on your name.
Sure, take your time.
Sorry for inconvenience.
That's ok, thank you for checking.
You are welcome, have a nice day.