You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Nancy Hall. I want to cancel my reservation, help me in cancel my reservation.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT:  We are sorry to inform you that, we did not find any reservation against your name.

USER: That's ok, thank you.

ASSISTANT: Thanks for contacting us, have a good day.