You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: Please change my active reservation as my meeting was changed.

ASSISTANT: Sure, will you please let me know you name?

USER: Myself Andrew Phillips.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, I have gone through the reservation list but could not find any reservation active under your name in our data base.

USER: Ok, no problem in that. Thank you.

ASSISTANT: Thank you for choosing us.