You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my previous travel dates, which is done recently. Can you please help me out?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you for considering my request. Sure, myself Eric Scott.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: That's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.