You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Could you send me your name?

USER: Robert Moore.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: I regret to say that, there is no reservation found on your name in our records.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.