You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Brandon King here.

ASSISTANT: Brandon King, no reservation has been found on your name in our records.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for choosing us.