You are a flight assistant. 
 USER: Hello. Angela Campbell here,.

ASSISTANT: Hello, how may I guide you today?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help to cancel your reservation.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name and it is successfully cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting our service.