We are glad to introduce NLP integration to our current project flow editor which gives you the ability to test your previews and flows with user interaction. Let us walk you through these new features.
But first let's discuss some of the building blocks which helps you create your first BOT which can evaluate user utterences and moves along the conversational flow accordingly.
Intent: An intent is the user’s intention. For example, if a user types “show me yesterday’s financial news”, the user’s intent is to retrieve a list of financial headlines. Intents are given a name, often a verb and a noun, such as “showNews”.
To plan the Intents for your chatbot, you need to consider what your customers might want to do, and what you want your chatbot to be able to handle. Choosing the correct intent for a user's input is the first step in providing a useful response. The intents you identify for your application will determine the dialog flows you need to create.
Entity: An entity modifies an intent. For example, if a user types “show me yesterday’s financial news”, the entities are “yesterday” and “financial”. Entities are given a name, such as “dateTime” and “newsType”.
Variables: Variables lets you store values of some entities that a bot can use at a later stage.
Let's build a Restaurant Bot prototype together using these features to have a better understanding. Our bot should be able to handle queries like Table Reservation and Restaurant Timings.
Create a new Flow Project on Amazon Alexa Platform.
You can notice a menu bar on left side of flow editor where you can define Intents, Entities and Variables as highlighted in the red box below.
We need our bot to be able to identify user request for table reservation for dinner or lunch, so for that we can create an enitity "LunchOrDinner".
To better train your NLP model, add as many synonyms as you can. Our first entity, "LunchOrDinner" can have two values i.e lunch or dinner. We have added similar words that a user/tester can use.
Next step is to create a variable. With a variable, we can store this newly created entity value and we can use it whenever we want. We are going to name our variable "ReservationType".
As you can see we have set its Entity Type to be "LunchOrDinner" from dropdown. You can also use this field to associate built in types like Age, Date, Duration etc. based on your needs.
Now, we need to create relevant Intents. We have identified the following intents for our bot:
Let's create these intents:
To better train your model, add as many phrases/utterances as you can, that a user/tester can use.
Following the same pattern create all the other intents.
Now lets create message nodes or flow of our bot. Our conversational map should look like this.
Attach Intents to a Connector:
Now its time to connect our intents with appropriate connections. To do that, click on the connection settings button (highlighted in the above image).
In Connection Settings, select the appropriate intent that you want your bot to evaluate at this point of conversation flow. You can also add conditions with the help of variables at this point.
Once you have associated appropriate intents with all the connectors, your flow editor should look like this:
How to select a Variable:
As you can see in red circled text node (see image above), we have used a variabe %ReservationType% which we created earlier. To select a variable in a text node, type % and a list of all the variables will appear. You can select your desired variable from that list as shown in image below:
Test using Interacive Simulator:
You can now test your bot using our new Interactive Simulator. Just click on the "Test" button from left side menu and start chating with your bot. You can use designated text input field as well as voice commands to record your answers.