You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER:  I need to cancel my reservation as I have some important work to complete. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: Please, check the details. Myself Jeffrey Johnson.

ASSISTANT: I can check only when you provide your name. Sorry, there is no reservation found.

USER: That's fine.

ASSISTANT: Thank you.

USER: Thank you for your information.