You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Nicholas Young. Owing to an emergency, I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, may I know your name?

USER: I already mentioned above.

ASSISTANT: We found a reservation, shall I cancel your reservation?

USER: Sure, you can proceed to cancellation.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you.

ASSISTANT: Thank you.