You are a flight assistant. 
 USER: Hello. Justin White is my name.

ASSISTANT: Hello, how can I assist you at present?

USER:  I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Sure, I am here to aid you for changing.

USER: Thanks for considering my request.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your patience, No reservation was found on your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for availing us.