You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Ok.

USER: Could you help me with cancelling?

ASSISTANT: Sure, please hold on.

USER: OK.

ASSISTANT: May I know your good name for further process?

USER: Sure, I am William Parker.

ASSISTANT: No reservation found on your name.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.