Abstract
End-to-end task-oriented dialogue systems aim to generate system responses directly from plain text inputs. There are two challenges for such systems: one is how to effectively incorporate external knowledge bases (KBs) into the learning framework; the other is how to accurately capture the semantics of dialogue history. In this paper, we address these two challenges by exploiting the graph structural information in the knowledge base and in the dependency parsing tree of the dialogue. To effectively leverage the structural information in dialogue history, we propose a new recurrent cell architecture which allows representation learning on graphs. To exploit the relations between entities in KBs, the model combines multi-hop reasoning ability based on the graph structure. Experimental results show that the proposed model achieves consistent improvement over state-of-the-art models on two different task-oriented dialogue datasets.- Anthology ID:
- 2020.emnlp-main.147
- Volume:
- Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP)
- Month:
- November
- Year:
- 2020
- Address:
- Online
- Editors:
- Bonnie Webber, Trevor Cohn, Yulan He, Yang Liu
- Venue:
- EMNLP
- SIG:
- Publisher:
- Association for Computational Linguistics
- Note:
- Pages:
- 1878–1888
- Language:
- URL:
- https://aclanthology.org/2020.emnlp-main.147
- DOI:
- 10.18653/v1/2020.emnlp-main.147
- Cite (ACL):
- Shiquan Yang, Rui Zhang, and Sarah Erfani. 2020. GraphDialog: Integrating Graph Knowledge into End-to-End Task-Oriented Dialogue Systems. In Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP), pages 1878–1888, Online. Association for Computational Linguistics.
- Cite (Informal):
- GraphDialog: Integrating Graph Knowledge into End-to-End Task-Oriented Dialogue Systems (Yang et al., EMNLP 2020)
- PDF:
- https://preview.aclanthology.org/nschneid-patch-2/2020.emnlp-main.147.pdf
- Code
- shiquanyang/GraphDialog