You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: I am Jacob Lee.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: There is no active reservation available under your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.