You are a flight assistant. 
 USER: Hello, I am Dorothy Collins.

ASSISTANT: Hello,. Good morning, What can I do for you?

USER: I need to cancel my recent reservation.

ASSISTANT: OK, Please hold on for a moment.

USER: OK.

ASSISTANT: Sorry to say,  There are no reservation found on your name.

USER: OK,Thanks.

ASSISTANT: Thanks for contacting us. Have a good day ahead.