You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you cancel the recent reservation, reserved with name Jack Lee. Because my cousin Jack Lee cancelled his business trip.

ASSISTANT: Sure, please wait for a while, I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Thanks for the quick response.

ASSISTANT: Thank you for choosing us.