You are a flight assistant. 
 USER: Hi. I am Karen Brown.

ASSISTANT: Hello, how may I assist you today?

USER: As the location of my business meeting got changed, can you please help me in changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name to change.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.