You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Brian Anderson. I want to cancel my recent reservation. Could you help me in booking?

ASSISTANT: Just a moment please.

USER: Ok.

ASSISTANT: I am sorry no reservation found on your name.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.