title: Dialogflow update context in the console
body: <p>I have a requirment where I want to append the parameter to context in the frontend screen.
  I can do it via webhook as :</p>
  
  <pre><code>1. Get Context Param1 and Parameters Param1
  2. Append Context Param1 with Parameters Param1
  3. Set Context 
  </code></pre>
  
  <p>But is it possible to do it from the frontend? We can access the context variable using <code>#contextA.variableB</code>. But can we write groovy or some other expression in the Argument section like <code>$variableB+#contextA.variableB</code> ?</p>
  
  <p>I hope you got my ask, let me know if the question is not yet clear, I will try to give brief example as well.</p>
  
  <p>Thanks in advance.</p>