title: DialogFlow, how to build a general intent for Yes and No responses
body: <p>I'm building a <code>DialogFlow</code> agent for use on the Google Assistant, and it is a conversational model that mainly uses <code>Yes</code> and <code>No</code> responses to navigate through a hierarchical story. I'm struggling to design the architecture using DialogFlow Intents because there doesn't seem to be a way to create a generic, global intent that uses the system <code>Yes</code> and <code>No</code> intents. I know you can add these as Followup Intents as a child of a parent intent, but these only trigger once.</p>
  
  <p>I'm using Cloud Functions on <code>Firebase</code> as the <code>webhook</code>, and will use <code>JSON</code> to build the responses and handle the input. Do I need to use entities to capture the responses instead? I don't think there is a system entity for <code>yes</code> and <code>no</code>.</p>