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Modeling Multi-Action Policy for Task-Oriented Dialogues (arxiv.org)
1 point by sel1 on Sep 4, 2019 | hide | past | pdf | discuss on HN

In plain words: A dialogue agent usually picks just one action per turn, forcing extra back-and-forth. This model generates several actions at once, using a memory cell that keeps adding acts until it decides to stop, and it beat the other tested approaches.

Abstract

Dialogue management (DM) plays a key role in the quality of the interaction with the user in a task-oriented dialogue system. In most existing approaches, the agent predicts only one DM policy action per turn. This significantly limits the expressive power of the conversational agent and introduces unwanted turns of interactions that may challenge users' patience. Longer conversations also lead to more errors and the system needs to be more robust to handle them. In this paper, we compare the performance of several models on the task of predicting multiple acts for each turn. A novel policy model is proposed based on a recurrent cell called gated Continue-Act-Slots (gCAS) that overcomes the limitations of the existing models. Experimental results show that gCAS outperforms other approaches. The code is available at https://leishu02.github.io/

Lei Shu, Hu Xu, Bing Liu, Piero Molino
arXiv:1908.11546 · cs.CL · submitted Aug 30, 2019
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