You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my recent reservation, can you please help me?

ASSISTANT: Sure, may I know your name to check your reservation from our database?

USER: Myself Nicholas Lee.

ASSISTANT: We regret to inform you that there is no reservation found on your name to cancel.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for opting us.