You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please change my existing reservation.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name to proceed further?

USER: Ashley Harris is my name.

ASSISTANT: Thank you for details, there is no active reservation found on your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.