title: How to set dialogflow fulfillment response json context without using webhook client?
body: <p>I want to create a rich response to Facebook integration using Dialogflow fulfillment. I tried using webhook but it's not working and then I try below way directly using response and now I am facing this context binding issue.</p>
  <p>I tried below</p>
  <pre><code>let responseJson = {};
  
      let rich = [
        {
          'text': {
              'text': [
                  text
              ],
          },
          'platform': 'FACEBOOK'
        },
      ];
  
      responseJson.fulfillmentMessages = rich;
  
      responseJson.outputContexts = context;
  
      response.json(responseJson);
  </code></pre>
  <p>my context JSON</p>
  <pre><code>{ name: 'MAINTENANCE_REQUEST', lifespan: 5, parameters: { maintenanceRequest: maintenanceRequest }}
  </code></pre>