You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: I need reservation cancellation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Helen Turner.

ASSISTANT: Thanks for providing your name. Sorry there is reservation found on your user name.

USER: Please cancel reservation.

ASSISTANT: Sorry there was no reservation on your name.

USER: Thanks for the help.