Hey, we are sorry but there are not solutions for DialogFlow and WordPress.
You can go and search in WordPress, but the results are very sad.
MyChatbot and Allio are no longer maintained and looks like they are no longer active.
Why DialogFlow is not working with WordPress?
Dialogflow setup is quite complicated and requires some effort. Unless you have a big business, DialogFlow does not make sense.
For WordPress and WooCommerce websites makes more sense to use WhatsApp. WhatsApp is very easy to use, is very easy to setup and it is working from day one. No learning curve.
So, if you want to use an amazing Chat Bot in your Website, the best option is WhatsApp me.