Before revision:  Experimental results on benchmark datasets in different settings (SGD, MultiWOZ2.2  , WOZ2.0, DSTC2, M2M, SNIPS, and ATIS) show that Seq2Seq-DU outperforms the existing methods.
After revision:  Experimental results on benchmark datasets in different settings (SGD, MultiWOZ2.2 , MultiWOZ2.1 , WOZ2.0, DSTC2, M2M, SNIPS, and ATIS) show that Seq2Seq-DU outperforms the existing methods.