You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation.

ASSISTANT: Sure, we are happy to help you. May I know your good name?

USER: Anna Robinson here.

ASSISTANT: Sorry, there is no active reservation on your name in our records.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.