Hi.
Hello, how  may I oblige you today?
My cousin's marriage is postponed to other dates, so please change my existing reservation.
Sure, may I know your good name please?
I am Mark Rodriguez.
Thank you for your details, please hold a moment.
Sure.
Thanks for waiting. We hardly tried to find your reservation but, no reservation has been found with your name.
Ok. Thanks for the kind response.
Thank you for choosing us, have a good day.