You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I just want to cancel my recent reservation, please help me on that.

ASSISTANT: Sure, may I know your name please?

USER: Yes, Nicholas Edwards here.

ASSISTANT: Sorry to say this Nicholas, we could not found a ticket with your name.

USER: Thank you for your information.

ASSISTANT: You are welcome.