Hi,I am Nicholas Nelson.
user
Hello, how can I provide assistance to you?
assistant
My plan to visit a function is postponed so that I want to change my  existing reservation.
user
OK, please wait a moment.
assistant
Sure.
user
Thanks for your time, no reservation found with your name.
assistant
Its OK, thanks for the information.
user
Thanks for reaching us, have a good day.
assistant