I guess the meta-bot would use the NLP interface of the other bots. (You need natural language processing and generation anyhow, so you may as well use it as a

I guess the meta-bot would use the NLP interface of the other bots. (You need natural language processing and generation anyhow, so you may as well use it as a bot-2-bot interface.) I think your 4th point is more problematic, when you have a meta bot and the actual interface interacting, then you will get false positives, which in this case means bought/not-bought tickets.