I own an app that suggest an event to some users I chose.
So I select, let's say, 40 invitees and I expect some of them (or all of them) to effectively participate to my event.
I want to have two columns, in the screen of my event's details, allowing me to switch between the list of all invitees that haven't participated yet, and attendees that have participated (meaning they clicked on : "I will be there !").
Question: How to name those two buttons switching columns so that any users can understand their meaning in 1 second?
I would choose "Participants" / "Attendees" but any participants are in fact an attendees that has participated, so I can't make this distinction..
I would choose "Participants" / "Pending" but it's not meaningful.
Any good UX-oriented idea? :)