Hello.
Hello. How may I help you at this moment?
I need to cancel my reservation due to my leaves got cancelled. So please help me with cancelling my reservation.
Sure, I am here to  help you with that.
Thank you.
Can you please provide me your full name to check your ticket status?
Sure, myself Daniel White.
Ok, please be on hold for a minute.
Sure, take your time.
Sorry to inform you that, there is no reservation found with your name in our database to cancel.
That's ok, no problem. Anyway, thank you for your time.
Ok, thank you for your positive response.