title: Amazon Alexa: store user's words
body: <p>I'm new to writing Alexa skills and want to write a skill to store the speaker's words.<br>
  For example, if I say, 'Alexa, save {whatever i say}', it should save the words in some string.<br>
  Now from what I understand, the intent schema something should be like</p>
  
  <pre><code>{
     intents:[
         "intent" : "SaveIntent"
     ]
  }
  </code></pre>
  
  <p>and utterances like</p>
  
  <pre><code>SaveIntent save
  SaveIntent store
  </code></pre>
  
  <p>In this case, how do I store '{whatever I say}'?</p>