You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Sure, we will help you. May I know your name please?

USER: Thank you, I am Stephen Parker.

ASSISTANT: Ok, please be on hold for some time.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we could not find any reservation with your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.