You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: May, I know your good name?

USER: Paul Miller here.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.