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