LCAN: A Label-Aware Contrastive Attention Network for Multi-Intent Recognition and Slot Filling in Task-Oriented Dialogue Systems

Shuli Zhang, Zhiqiang You, Xiao Xiang Qi, Peng Liu, Gaode Wu, Kan Xia, Shenguang Huang


Abstract
Multi-intent utterances processing remains a persistent challenge due to intricate intent-slot dependencies and semantic ambiguities. Traditional methods struggle to model these complex interactions, particularly when handling overlapping slot structures across multiple intents. This paper introduces a label-aware contrastive attention network (LCAN), a joint modeling approach for multi-intent recognition and slot filling in task-oriented dialogue systems. LCAN addresses this issue by integrating label-aware attention and contrastive learning strategies, improving semantic understanding and generalization in multi-intent scenarios. Extensive experiments on the MixATIS and MixSNIPS datasets demonstrate LCAN’s superiority over existing models, achieving improved intent recognition and slot filling performance, particularly in handling overlapping or complex semantic structures in multi-intent settings.
Anthology ID:
2025.findings-emnlp.1395
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2025
Month:
November
Year:
2025
Address:
Suzhou, China
Editors:
Christos Christodoulopoulos, Tanmoy Chakraborty, Carolyn Rose, Violet Peng
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
25603–25612
Language:
URL:
https://preview.aclanthology.org/author-page-yu-wang-polytechnic/2025.findings-emnlp.1395/
DOI:
10.18653/v1/2025.findings-emnlp.1395
Bibkey:
Cite (ACL):
Shuli Zhang, Zhiqiang You, Xiao Xiang Qi, Peng Liu, Gaode Wu, Kan Xia, and Shenguang Huang. 2025. LCAN: A Label-Aware Contrastive Attention Network for Multi-Intent Recognition and Slot Filling in Task-Oriented Dialogue Systems. In Findings of the Association for Computational Linguistics: EMNLP 2025, pages 25603–25612, Suzhou, China. Association for Computational Linguistics.
Cite (Informal):
LCAN: A Label-Aware Contrastive Attention Network for Multi-Intent Recognition and Slot Filling in Task-Oriented Dialogue Systems (Zhang et al., Findings 2025)
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PDF:
https://preview.aclanthology.org/author-page-yu-wang-polytechnic/2025.findings-emnlp.1395.pdf
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