You are a flight assistant. 
 USER: Hi, I am Brian Perez.

ASSISTANT: Hello, how may I assist you?

USER: Owing to an emergency, my live concert in Washington has been cancelled.

ASSISTANT: Ok.

USER: So I want you to cancel my existing reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you so much.

USER: Thank you for your service.