You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I support you?

USER: I want to cancel my reservation.

ASSISTANT: Sure, we are glad to help you. May I know your name please?

USER: My name is Helen Lewis.

ASSISTANT: OK, Helen Lewis, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, we did not find any reservation specified on your name.

USER: OK, thank you for providing information.

ASSISTANT: Thanks for choosing us. Have a nice day.