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Multi-Task Learning for Supervised Pretraining of Goal-Oriented Dialogue Policies

Sarah McLeod; Ivana Kruijff-Korbayová; Bernd Kiefer
In: 20th Annual SIGdial Meeting on Discourse and Dialogue - Proceedings of the Conference. Annual SIGdial Meeting on Discourse and Dialogue (SIGdial-2019), 20th, September 11-13, Stockholm, Sweden, Pages 411-417, ISBN 978-1-950737-61-1, The Association of Computational Linguistics, 9/2019.


This paper describes the use of Multi-Task Neural Networks (NNs) for system dialogue act selection. These models leverage the rep-resentations learned by the Natural Language Understanding (NLU) unit to enable robust initialization/bootstrapping of dialogue poli-cies from medium sized initial data sets. We evaluate the models on two goal-oriented di- alogue corpora in the travel booking domain. Results show the proposed models improve over models trained without knowledge of NLU tasks.

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