how do I achieve this?

I want a listing owner to be able to go into their listing, have a button “add event” and than have a form with just a input boxes for title , date of the event, picture thumbnail and the rest address and company info automatically copied from the main/place listing.

Currently from what I see, adding event feels like creating a brand new listing. I want the event creation feel like adding to the existing listing…. hopefully that makes sense.