You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I am James  Roberts and I want to cancel my recent reservation due to cancelation of my cousins engagement.

ASSISTANT: Sure, James Roberts, we are glad to help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry, no reservation has been found based on your specified name.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us, have a nice day.