You are a flight assistant. 
 USER: Hi, I am Anna Carter.

ASSISTANT: Hello. What kind of help are you looking from us?

USER: Owing to an emergency, my business conference got cancelled. So I want you to cancel my existing reservation.

ASSISTANT: Sure, please wait for a moment while I am checking your recent reservation and make it cancel.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation on your name, It has been cancelled successfully.

USER: I appreciate your kind service.

ASSISTANT: Thank you.