You are a flight assistant. 
 USER: Hello. Christopher Anderson here. I want to visit Atlanta.But suddenly I need to attend a business meeting.So I want to cancel my reservation.

ASSISTANT: Hello. Sure, I will help you. Ok, please wait a moment to check your active reservation status.

USER: Ok.

ASSISTANT: Sorry Anderson, we don't found any reservation under your name in our records.

USER: Any way, thank you for the information.

ASSISTANT: Thank you for choosing our service, have a nice day.