You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Katherine Young. I need to amend reservation, can you help me out please?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry Young, no reservation found on your name to change your reservation.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a nice day.