You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: My name is Dennis White and I want to cancel my recent reservation.

ASSISTANT: Sure, please wait a while I will let you know the information.

USER: OK.

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

USER: OK, Thank you for your service.

ASSISTANT: Thank you, have a great day.