Multi-Grained Conversational Graph Network for Retrieval-based Dialogue Systems

Quan Tu, Chongyang Tao, Rui Yan


Abstract
Retrieval-based dialogue agents aim at selecting a proper response according to multi-turn conversational history. Existing methods have achieved great progress in terms of retrieval accuracy on benchmarks with pre-trained language models. However, these methods simply concatenate all turns in the dialogue history as the input, ignoring the dialogue dependency and structural information between the utterances. Besides, they usually reason the relationship of the context-response pair at a single level of abstraction (e.g., utterance level), which can not comprehensively capture the fine-grained relation between the context and response. In this paper, we present the multi-grained conversational graph network (MCGN) that considers multiple levels of abstraction from dialogue histories and semantic dependencies within multi-turn dialogues for addressing. Evaluation results on two benchmarks indicate that the proposed multi-grained conversational graph network is helpful for dialogue context understanding and can bring consistent and significant improvement over the state-of-the-art methods.
Anthology ID:
2024.lrec-main.1026
Volume:
Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)
Month:
May
Year:
2024
Address:
Torino, Italia
Editors:
Nicoletta Calzolari, Min-Yen Kan, Veronique Hoste, Alessandro Lenci, Sakriani Sakti, Nianwen Xue
Venues:
LREC | COLING
SIG:
Publisher:
ELRA and ICCL
Note:
Pages:
11756–11765
Language:
URL:
https://aclanthology.org/2024.lrec-main.1026
DOI:
Bibkey:
Cite (ACL):
Quan Tu, Chongyang Tao, and Rui Yan. 2024. Multi-Grained Conversational Graph Network for Retrieval-based Dialogue Systems. In Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024), pages 11756–11765, Torino, Italia. ELRA and ICCL.
Cite (Informal):
Multi-Grained Conversational Graph Network for Retrieval-based Dialogue Systems (Tu et al., LREC-COLING 2024)
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PDF:
https://aclanthology.org/2024.lrec-main.1026.pdf