For tasks & information which are required for a short duration & that’s it and value for which is only for that moment should be implemented as bots.
Parking, ordering are all short, instantaneous tasks which are only of value there & then. Anything that meets this criteria can fit the bill of being a chatbot
AmA on HN will be more effective as people on reditt, do tend to troll around on some questions. That said, it would be better to have a collaboration with reditt to allow general users to join in as well.