You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my reservation, why because my friends already done my reservation with some other airlines.

ASSISTANT: Sure. may I know your name?

USER: Sure, my name is Dennis Lee.

ASSISTANT: Wait a minute.

USER: Sure.

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

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.