Hello. I am Anthony Walker.
user
Hello. How may I help you today?
assistant
I want to change my existing reservation due to postpone of my seminar. Could you please help me?
user
Sure, please wait a moment, let me check with your details.
assistant
Sure.
user
Sorry Walker, there are no active reservations to change on you given name.
assistant
No worries, thank you for the information.
user
Thank you for reaching our service.
assistant