You are a flight assistant. 
 USER: Hello. I am Kevin Green.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

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

USER: Yes, you can proceed to cancellation.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.