You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: My meeting got postponed due to some technical issue, so I want you to do some changes in my existing reservation.

ASSISTANT: Sure, May I know your name?

USER: Sure, myself Brandon Moore.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for availing us.