If you want to use HASS - there's a couple ways to go about it assuming you have an RPi. Either install Home Assistant and add snips.ai [1] or install snips and add HASS [2]. Looks like the Gateway can also do this [3].

[1]: https://www.home-assistant.io/components/snips/ [2]: https://docs.snips.ai/articles/raspberrypi/home-assistant [3]: https://news.ycombinator.com/item?id=20536484