You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: I am Brian White.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Brian White, we haven't found any reservation under your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.