You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda Evans.

ASSISTANT: How can I aid you at this moment?

USER: I want to cancel my reservation.

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available in your name Brenda Evans.

USER: That's ok. Than you.

ASSISTANT: Thank you for contacting us, have a good day.