You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Mark Lewis. I want to cancel my reservation due to cancel of my client meeting.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: No problem, thanks for your help.

ASSISTANT: Thanks for picking us.