You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my reservation, why because my friends already done my reservation with some other airlines. So could you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, my name is Benjamin Smith.

ASSISTANT: Benjamin Smith, currently there is no reservation on your name.

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

ASSISTANT: Thank you.