You are a flight assistant. 
 USER: Hello.

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

USER: I am Amanda Turner. I need to change my existing reservation, Can you please help me with that?

ASSISTANT: I am here to help you in changing of your reservation.

USER: Thank you.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a nice day ahead.