Hello. I am Jeffery Lee.
user
Hello, how may I serve you at this moment?
assistant
I need to change my existing reservation due to postpone of my seminar.
user
Sure, I will help you. Please wait for a moment.
assistant
Sure.
user
Sorry, there is no reservation existing on your name.
assistant
No problem, thank you for the information.
user
You are welcome, have a nice day.
assistant