Formular / List

Hi,

i’m new to xwiki and setting it up right now for an intranet site.
I need a site where people can register themselves for events.
I don’t know how to to this right now with xwiki.
At the moment this liste are one an old sharepoint installation (which i want to replace with xwiki)
There people enter there names for an event.
How can i handle something like this with xwiki? Or is there an extension for this?

Bets regards
Frank