You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I am Mark Evans and I want to cancel my recent reservation.

ASSISTANT: OK, Mark Evans, We are here to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, We did not find any reservation specified on your name.

USER: Thank you for your service.

ASSISTANT: Thank you for your time.