You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: Owing to an emergency, my live concert at Washington has been cancelled. So I request you to cancel my existing reservation?

ASSISTANT: Sure. To proceed further, May I know your name?

USER: Sure, I had a recent reservation with name Debra Lewis.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: Ok, no problem at all. I appreciate your kind service.

ASSISTANT: Thank you for reaching us.