First published: 2017 | Last updated: May 2022
One of the nice things about tools like Chatfuel and ManyChat is their visual interface for creating decision tree chatbots.
What are decision tree chatbots?
These go by many names – conditional logic chatbots, click-bots, scripted bots (which I like the best).
The important thing is that the entire conversation is pre-scripted, there isn’t any Natural Language Understanding or AI of any sort, and people chat with your bot by simply choosing (clicking on) one of the options presented as buttons.
You can create similar chatbots using Dialogflow, and I will explain how in this article.
In this article, I will explain how to create a Decision Tree chatbot using Dialogflow ES.
A decision tree chatbot, as the name suggests, is a “scripted” bot which will ask the user to select between two or more options and move the conversation based on the user’s choice.
Dichotomous Key Bot
We will be building a Dichotomous Key bot, which will ask the user to answer Yes/No questions and based on the answer, will identify a given vertebrate as either a mammal, or a bird, or a reptile, or a fish or an amphibian.
This is a tree structure so technically, it CAN be built using follow up intents. However, because the answers are of the Yes/No type, this could lead to conflicts between follow up intents.
Here is the Mindomo flowchart for this decision tree
So we just go through this flowchart and build out our intents to reflect it.
Add an intent called identify.vertebrate
Add an intent called hasfur.YES
Add a corresponding intent for hasfur.NO
Keep following this pattern for all the nodes in the flowchart
Finally we come to hasgills.YES
Here is a demo of the bot in action
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