You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi.

USER: I'm Nancy Campbell.

ASSISTANT: OK Nancy, how can help you out?

USER: I have done flight ticket reservation last week. Accidentally that trip is cancelled. So, can you please my reservation?

ASSISTANT: Sorry, I can't get you Nancy.

USER: Can you please cancel my recent reservation?

ASSISTANT: Sure, wait a moment Nancy, for checking your reservation.

USER: OK.

ASSISTANT: Sorry Nancy, when I checked there is no ticket reserved on your name.

USER: OK. Thank you for your help.