You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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. Can you please help me to change it?

ASSISTANT: Sure, may I know your name to check for the details?

USER: Sure, my name is Kevin Scott.

ASSISTANT: Please allow me a moment to check for the status.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: Ok, thanks for your help.

ASSISTANT: Thank you for reaching us.