Hello, I am Matthew Evans.
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 aid me to change it?
user
Sure, I am here to help you. Please wait for a while.
assistant
Sure.
user
Thank you for your time, we did not find any reservation on your name.
assistant
Ok, thanks for your help.
user
Thank you for choosing us.
assistant