You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Owing to an emergency I had to request for this cancel reservation.

ASSISTANT: Sure, May I know your name?

USER: My name is Catherine Harris.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: We have found a reservation on your name, Shall I cancel it?

USER: Please cancel reservation.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.