You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Thank you.

ASSISTANT: Meanwhile, may I know your name?

USER: Sure, my name is Mark Moore.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem.

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

USER: Thank you.