What are Intents, Entities and Utterances?

What are utterances?

The conversational input messages from the user to the application that the application needs to understand the natural language text is the utterances.

In other words, utterances are nothing but the user input that our app needs to understand the text. For example, in the flight booking app, the user may say something like, “book my flight from Paris to Japan”, or “I want to book a flight to Japan from Paris.” These are the utterances that will be received by the app that the app needs to understand what the user’s intent is.