/// <summary>
 ///  If an error occurs, the node is being messaged about it.
 ///
 /// @param[in]  cause   the cause for the error
 /// </summary>
 private void onDictationComplete(DictationCompletionCause cause)
 {
     pling.Play(0);
     if (cause != DictationCompletionCause.Complete)
     {
         R.error();
     }
 }