Don't beat yourself up too hard, the "respond" icon looks like a reply button and your didn't want to reply. The text below it says "respond," which sounds like it's short for "respond to the sender." It would maybe be better if the icon with the curved line and arrow pointed up then split with lines/arrows pointing left and right so that the button looked like it went backward and forward, but I don't know that there's enough room for that. The text below it should read "react" or "handle" or something truly good (because those two suggestions aren't) rather than "respond".