You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me out in changing my recent reservation.

ASSISTANT: Sure, may I know your name please?

USER: Nichole Lee.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no active reservation found with your name in our records.

USER: That's ok, thank you.

ASSISTANT: Most welcome.