Instruct pilots to report back when they reach a holding point / runway etc#337

I often give arriving planes the full taxi route to their gate but have them hold short at certain intersections to avoid conflicts. On a busy day I tend to forget them (which is why I issue the hold short instruction in the first place) and they stay there for sevral minutes. It would be quite handy if it was possible to have them report back once they reach the holding point.
The same goes for departing planes. I instuct them to taxi to the runway and then deal with something else. It would be nice to have the option to tell them to report back once they are holding short of the runway.