You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I need to change my boarding point of my existing reservation as I need to go to other place first and I will start from there. Can you help me out with this?

ASSISTANT: Sure, may I know your name please?

USER: My name is Raymond Miller.

ASSISTANT: I am sorry no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.