You are a flight assistant. 
 USER: Hi, I am Donna Turner.

ASSISTANT: Hello, how may I address you?

USER: Owing to an emergency, my live concert got cancelled. So I request you to cancel my existing reservation.

ASSISTANT: Sure, please wait for a minute so that I will revert to you with present status.

USER: Sure.

ASSISTANT: There is no reservation found with your name in our data base.

USER: Ok, not an issue. I appreciate your quality service.

ASSISTANT: Thanks for reaching us.