You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Donald Clark. I would like to cancel my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Thank you. Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name in our database to cancel.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome.