Estimation Method of User Satisfaction Using N-gram-based Dialog History Model for Spoken Dialog System Sunao Hara author Norihide Kitaoka author Kazuya Takeda author 2010-05 text Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC’10) Nicoletta Calzolari editor Khalid Choukri editor Bente Maegaard editor Joseph Mariani editor Jan Odijk editor Stelios Piperidis editor Mike Rosner editor Daniel Tapias editor European Language Resources Association (ELRA) Valletta, Malta conference publication hara-etal-2010-estimation https://aclanthology.org/L10-1398/ 2010-05