You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you out?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for accepting my request.

ASSISTANT: May I know your good name?

USER: Myself Edward Hernandez.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for contacting us.