A Template-guided Hybrid Pointer Network for Knowledge-based Task-oriented Dialogue Systems
Dingmin Wang, Ziyao Chen, Wanwei He, Li Zhong, Yunzhe Tao, Min Yang
Abstract
Most existing neural network based task-oriented dialog systems follow encoder-decoder paradigm, where the decoder purely depends on the source texts to generate a sequence of words, usually suffering from instability and poor readability. Inspired by the traditional template-based generation approaches, we propose a template-guided hybrid pointer network for knowledge-based task-oriented dialog systems, which retrieves several potentially relevant answers from a pre-constructed domain-specific conversational repository as guidance answers, and incorporates the guidance answers into both the encoding and decoding processes. Specifically, we design a memory pointer network model with a gating mechanism to fully exploit the semantic correlation between the retrieved answers and the ground-truth response. We evaluate our model on four widely used task-oriented datasets, including one simulated and three manually created datasets. The experimental results demonstrate that the proposed model achieves significantly better performance than the state-of-the-art methods over different automatic evaluation metrics.- Anthology ID:
- 2021.dialdoc-1.3
- Volume:
- Proceedings of the 1st Workshop on Document-grounded Dialogue and Conversational Question Answering (DialDoc 2021)
- Month:
- August
- Year:
- 2021
- Address:
- Online
- Editors:
- Song Feng, Siva Reddy, Malihe Alikhani, He He, Yangfeng Ji, Mohit Iyyer, Zhou Yu
- Venue:
- dialdoc
- SIG:
- Publisher:
- Association for Computational Linguistics
- Note:
- Pages:
- 18–28
- Language:
- URL:
- https://aclanthology.org/2021.dialdoc-1.3
- DOI:
- 10.18653/v1/2021.dialdoc-1.3
- Cite (ACL):
- Dingmin Wang, Ziyao Chen, Wanwei He, Li Zhong, Yunzhe Tao, and Min Yang. 2021. A Template-guided Hybrid Pointer Network for Knowledge-based Task-oriented Dialogue Systems. In Proceedings of the 1st Workshop on Document-grounded Dialogue and Conversational Question Answering (DialDoc 2021), pages 18–28, Online. Association for Computational Linguistics.
- Cite (Informal):
- A Template-guided Hybrid Pointer Network for Knowledge-based Task-oriented Dialogue Systems (Wang et al., dialdoc 2021)
- PDF:
- https://preview.aclanthology.org/nschneid-patch-4/2021.dialdoc-1.3.pdf
- Code
- wdimmy/THPN
- Data
- Dialogue State Tracking Challenge