@InProceedings{williams:2011:SIGDIAL2011,
  author    = {Williams, Jason},
  title     = {An Empirical Evaluation of a Statistical Dialog System in Public Use},
  booktitle = {Proceedings of the SIGDIAL 2011 Conference},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon},
  publisher = {Association for Computational Linguistics},
  pages     = {130--141},
  url       = {http://www.aclweb.org/anthology/W11-2016}
}