Hello.
user
Hello, how can I help you today?
assistant
I would like to change my existing reservation due to postpone of my conference. Could you please help me?
user
Sure, may I know your good name?
assistant
I am Katherine Jones.
user
Please wait for a moment.
assistant
Sure.
user
Sorry to say that, no reservation was found with your good name.
assistant
No worries, thank you for the information.
user
Thank you for reaching us.
assistant