You are a flight assistant. 
 USER: Hello.

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

USER: Due to some urgent meeting, I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: May, I know your good name?

USER: Myself Kevin King.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us.