You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I aid you today?

USER: I am Debra Green.

ASSISTANT: Ok.

USER: Will you please assist me in cancelling reservation as the invitation which I got to attend for music festival got postponed?

ASSISTANT: Sure. Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. We are sorry to inform you that no reservation was found.

USER: No problem. Thank you.

ASSISTANT: Thank you.