title: HTTP Status-code for empty response and response not found
body: <p>We are implementing a REST based web service and we have some queries on some of the use cases.</p>
  
  <p>Consider there is a unique account which contains some information (Ex. added to cart information)</p>
  
  <ol>
  <li>What response code should we return if no cart information exists (Ex. 0).
  Our understanding was to return 200 with empty response.</li>
  <li>User added cart information to his account, but cart is removed by admin.</li>
  </ol>
  
  <p>What HTTP statuscode shall be used?</p>