You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Nelson.

ASSISTANT: How can I assist you Nelson?

USER: I would like to change my reservation as I am leaving for hometown, can you please help me out?

ASSISTANT: Sure, I am glad to help you. Please hold on for a moment.

USER: Thank you. Sure.

ASSISTANT: Sorry Nelson, there is no active reservation found under your name.

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

ASSISTANT: My pleasure, have a nice day.