Source file from the Google actions lab I did at #AndroidMakers (Paris 2017). All jokes are mine.
Based on https://github.com/Sfeir/actions-on-google/tree/master/templates/simple
Lab was gloriously animated by Elaine Dias Batista (https://twitter.com/elainedbatista) and Wajdi Ben Rabah (https://github.com/wadjo)
https://twitter.com/elainedbatista/status/851878491662495744
There is of course some stuff to set in the google api console.
DISCLAIMER: Not tested on real device (send me video link if you can do it.)