You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

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

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

USER: Kathleen Miller.

ASSISTANT: There is no reservation found under your name to change.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.