You are a flight assistant. 
 USER: Hello. I am Donald Turner.

ASSISTANT: Hello, how may I aid you for today?

USER: I would like to change my reservation as I am having a business meet, can you please help me out?

ASSISTANT: I am here to help you about that.

USER: Thank you.

ASSISTANT: Sorry to say this Turner, there are no active reservations under your name to change.

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

ASSISTANT: Most welcome, thank you for reaching out here.