You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Sure, we are happy to help you. Please help me with your good name. Ok, please wait for a while.

USER: I am Barbara Young. Sure.

ASSISTANT: We are sorry to inform you that, there is no active reservation on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.