You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I support you today?

USER: Owing for an emergency, I would like to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, may I know your name please?

USER: My name is Christine Baker.

ASSISTANT: Please wait, I will check your previous reservation.

USER: Sure.

ASSISTANT: I found your reservation and cancelled it successfully.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us.