You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, we are happy to help you.

USER: Thanks.

ASSISTANT: For changing, we need your good name. Please provide it.

USER: I am Nicole Young.

ASSISTANT: Sorry to say that, there are no active reservation found on your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.