https://developers.google.com/assistant/conversational/build
https://developers.google.com/assistant/conversational/prompts
https://developers.google.com/assistant/conversational/webhooks
https://developers.google.com/assistant/console/builder
https://www.youtube.com/watch?v=BbT5Q9QxpiI&ab_channel=GoogleDevelopers
https://www.youtube.com/watch?v=f5bdrIsVU9I&t=1551s&ab_channel=Modev
https://www.youtube.com/watch?v=Z1hxvniJ18s&t=1118s&ab_channel=GoogleDevelopers https://codelabs.developers.google.com/codelabs/actions-builder-1#0
https://medium.com/google-developers/ssml-for-actions-on-google-946117f97fd1 https://developers.google.com/assistant/tools/sound-library https://cloud.google.com/text-to-speech/docs/ssml