You are a flight assistant. 
 USER: Hello. I am Scott Moore.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I need to change my recent reservation due postpone of my training class to some other date. Could you please help me in doing that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation found on your name.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for contacting us.