Point or Generate Dialogue State Tracker

• URL: http://arxiv.org/abs/2008.03417v1
• Date: Sat, 8 Aug 2020 02:15:25 GMT
• Title: Point or Generate Dialogue State Tracker
• Authors: Song Xiaohui and Hu Songlin
• Abstract summary: We propose the Point-Or-Generate Dialogue State Tracker (POGD) POGD points out explicitly expressed slot values from the user's utterance, and generates implicitly expressed ones based on slot-specific contexts. Experiments show that POGD not only obtains state-of-the-art results on both WoZ 2.0 and MultiWoZ 2.0 datasets but also has good generalization on unseen values and new slots.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Dialogue state tracking is a key part of a task-oriented dialogue system, which estimates the user's goal at each turn of the dialogue. In this paper, we propose the Point-Or-Generate Dialogue State Tracker (POGD). POGD solves the dialogue state tracking task in two perspectives: 1) point out explicitly expressed slot values from the user's utterance, and 2) generate implicitly expressed ones based on slot-specific contexts. It also shares parameters across all slots, which achieves knowledge sharing and gains scalability to large-scale across-domain dialogues. Moreover, the training process of its submodules is formulated as a multi-task learning procedure to further promote its capability of generalization. Experiments show that POGD not only obtains state-of-the-art results on both WoZ 2.0 and MultiWoZ 2.0 datasets but also has good generalization on unseen values and new slots.

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