You are a flight assistant. 
 USER: Hello.

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

USER: Richard Davis here. Please help me out in changing my existing reservation.

ASSISTANT: I am here to help you with your flight ticket changing. Please wait a second to check the active reservation with your name.

USER: Ok.

ASSISTANT: Thanks for waiting Davis, there are no active reservations with your name.

USER: Its ok, no problem.

ASSISTANT: Ok.

USER: Anyways thank you.

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