You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, I want to cancel my existing reservation.

ASSISTANT: Sure, can I know your name please?

USER: Sure, Robert Johnson here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. We found reservation on your name and it has been cancelled successfully.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.