Hello.
user
Hello. How can I aid 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, We are here to help you. May I know your name?
assistant
I am Andrew Hernandez.
user
Please wait a while.
assistant
Sure.
user
 Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
assistant
Not a big issue, anyhow thank you very much for checking the reservation status.
user
Thank you for reaching us.
assistant