You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you today?

USER: My name is Donna Adams.

ASSISTANT: OK.

USER: Please cancel my reservation.

ASSISTANT: OK, please wait. I will check and revert you.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name. Thanks for contacting us, have a nice day.

USER: Thanks.