Hi.
user
Hello, how may I serve you at this moment?
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
May I know your good name?
assistant
I am Angela Baker.
user
Please wait.
assistant
Sure.
user
There is no reservation found on your given name.
assistant
Ok, not an issue. Thank you for your information.
user
Thank you for choosing us.
assistant