Hello, Donna Martin here.
user
Hello, how can I be your helping hand today?
assistant
Due to some reasons my brother engagement has been postponed so I want to change my existing reservation.
user
Sure, Wait a while I will check the availability of your existing reservation and let you know.
assistant
Ok.
user
Thank you for waiting, Unfortunately there is no reservation found with your name.
assistant
Thank you for your service.
user
Thank you for choosing us, Have a nice day.
assistant