11. The system of claim 8 , the computer-readable storage medium having additional instructions stored which result in the operations further comprising: when the classification meets a re-prompt threshold, issuing a prompt to the user to attempt receiving the user utterance a second time.
11. The system of claim 8 , the computer-readable storage medium having additional instructions stored which result in the operations further comprising: when the classification meets a re-prompt threshold, issuing a prompt to the user to attempt receiving the user utterance a second time. 12. The system of claim 11 , wherein when the received user utterance is received the second time and is silence, the classification meets the re-prompt threshold.