Hi.
user
Hello, how can I assist you today?
assistant
 I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Will you help me in changing my existing reservation?
user
Sure, may I know your name please?
assistant
My name is Kenneth Clark.
user
Ok, please wait for a moment.
assistant
Ok.
user
Sorry, there was no reservation found with your name.
assistant
OK, not an issue. Thank you for your information.
user
Thank you for opting us.
assistant