You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Andrew Taylor.

ASSISTANT: Sorry, we could not find any reservation against your name.

USER: Thank you for your information.

ASSISTANT: Thank you for opting us.