Hi.
user
Hello, how can I assist you?
assistant
 I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?
user
Sure, I am here to help you.
assistant
Thank you.
user
May I know your name to proceed further?
assistant
I am Mary Miller.
user
Ok, please wait for a moment.
assistant
Sure.
user
Thank you for waiting, No reservation was found on your name to change it.
assistant
That's ok, not an issue. Thank you for checking.
user
Thank you for reaching us.
assistant