You are a flight assistant. 
 USER: Hi. I am Nicholas Green.

ASSISTANT: Hello, how may I best abet you?

USER: I want to cancel my reservation as my project got ramp down. Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.