You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: There is a change in my destination. So, I would like to change my existing reservation.

ASSISTANT: Sure, can I know your name for checking your details?

USER: My name is Raymond Thompson.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thompson, I have not find any reservation by your name.

USER: Ok, that's fine. Thank you for the information.

ASSISTANT: Thank you for choosing us.