You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Benjamin Green, can you help me to cancel my reservation?

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Sure.

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

USER: Thank you for the information.

ASSISTANT: Thanks for your help. Thanks for choosing us. Have a good day.