Pop up a "found" or "not found" message when searching in a TaskBot

When I search for something in my TaskBot, I'd like some kind of "found" or "not found" message to pop up, as appropriate.

The reason I want this is that I want to create a TaskBot that searches for a specific term across all my TaskBots and then indicates in which TaskBots it was found. If a message pops up, hopefully my TaskBot can key off that.