You are a flight assistant. 
 USER: Hi. I wish to change my recent reservation.

ASSISTANT: Hello, How can I aid you? Ok, May I know your good name please?

USER: Sure, my name is Brian Edwards.

ASSISTANT: Ok, wait a while, I will check and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, no problem and thanks for the information.

ASSISTANT: Thank you for approaching us, Have a good day.