You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I am happy to help you. May I know your good name?

USER: I am James White.

ASSISTANT: Sorry, we did not find any active reservation on your name in our records.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for availing us.