Building Conversational Experiences With Actions On Google

Building Conversational Experiences With Actions On Google:

https://blog.dialogflow.com/post/build-for-google-assistant/

https://dialogflow.com/docs/concepts/slot-filling#top_of_page

This conversation playground allows you to explore constructing a response that adheres to the Actions on Google API.
https://developers.google.com/actions/conversation-api-playground

fulfillment in js - nice tutorial

https://www.youtube.com/watch?v=biN00SoMRI8

https://www.youtube.com/watch?v=yFyNouueu2g

very good video sample

C# sample - Your First Chatbot using Microsoft’s Bot Framework and Dialogflow API


very good audio sample 

Advanced sample :

Building a voice-enabled Chatbot for a website using Dialogflow, Fulfillment + Firebase cloud functions and jQuery