You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: May I know your name please?

USER: Thank you for accepting my request, I have reserved it on the name of Mark Brown.

ASSISTANT: I have found your reservation and I has successfully cancelled your reservation.

USER: Thank you for your kind help.

ASSISTANT: Thank you for choosing us.

USER: Welcome.