Hello.
Hello. How can I hand help to you?
I want to cancel my reservation, due to some problems I am not unable travel those dates, can you please cancel my reservation?
Sure, I am happy to help you. May  I know your name?
Thanks. Sure, my name is Amanda King.
I am unable to found your previous ticket booking to cancel that one.
Oh! May be I am not booked my ticket properly at that time.
Thank you for reaching us, have a nice day.
Thank you for your information.
Most welcome.