Challenge: Existing methods to enable skill routing do not scale in terms of the number of skills and skill on-boarding.
Approach: They propose a model-based approach to enable natural conversation by allowing frequent policy updates . they propose an annotation-based system, rule-based model, and bandit-based learning .
Outcome: The proposed method is scalable and cost-effective, the authors show . they show that it can improve the user experience without abrupt policy changes .

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Challenge: Large-scale conversational AI systems require constant update to adapt to changing customer behavior and trends . lack of self-awareness in feedback-based systems can cause degradation of performance . et al., e. alderman and scott k. d. argues that such systems are not scalable enough to sustain the rapid update pace of conversational systems.
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A Practical Approach for Building Production-Grade Conversational Agents with Workflow Graphs (2025.acl-industry)

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Challenge: Large Language Models (LLMs) have led to significant improvements in various service domains, including search, recommendation, and chatbot applications.
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Human-centric dialog training via offline reinforcement learning (2020.emnlp-main)

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Challenge: a novel offline RL method can train dialog models to produce better conversations without the risk of humans teaching it harmful chat behaviors.
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When Speed Meets Intelligence: Scalable Conversational NER in an Ever-evolving World (2026.eacl-industry)

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Challenge: Large Language Models excel at understanding conversational semantics, but lack of data makes them impractical for production deployment.
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A Scalable Framework for Learning From Implicit User Feedback to Improve Natural Language Understanding in Large-Scale Conversational AI Systems (2021.emnlp-main)

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Challenge: Existing methods to improve NLU are laborintensive and expensive.
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Development and Deployment of a Large-Scale Dialog-based Intelligent Tutoring System (N19-2)

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Challenge: Dialog-based intelligent tutoring systems capture the effectiveness of expert human teacher-learner interactions by using natural language dialogue.
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BIG5-CHAT: Shaping LLM Personalities Through Training on Human-Grounded Data (2025.acl-long)

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Challenge: Existing methods for embedding human personality traits into LLMs are limited by realism and validity issues.
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SCALER: Synthetic Scalable Adaptive Learning Environment for Reasoning (2026.findings-acl)

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Challenge: Reinforcement learning (RL) is a principled way to enhance the reasoning capabilities of large language models, yet its effectiveness hinges on training signals that remain informative as models evolve.
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Enhancing Chat Language Models by Scaling High-quality Instructional Conversations (2023.emnlp-main)

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Challenge: a recent study validates the effectiveness of chat language models by fine-tuning instruction data.
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Learning New Skills after Deployment: Improving open-domain internet-driven dialogue with human feedback (2023.acl-long)

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Challenge: Frozen models trained to mimic static datasets can never improve their performance.
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