You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my reservation as my plan to meet my share holder is postponed.

ASSISTANT: Sure, we are here to help you with this.

USER: Thanks for considering my request.

ASSISTANT: Please hold for a moment, let me check your previous reservation status.

USER: Sure.

ASSISTANT:  May I know your name please?

USER: Sure, you can check my reservation on the name of Jonathan Campbell.

ASSISTANT: Sorry to tell you that, there is no active reservation found with your name in our reservation list to cancel it.

USER: Ok, thank you.

ASSISTANT: You are welcome, thank you for reaching us.