You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Mark Young, can you please cancel my recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, sure.

ASSISTANT: Sorry Mark, no reservation is found by your name.

USER: Ok, fine thank you for checking.

ASSISTANT: My pleasure, have a nice day.