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Patrick Ernst

4 accepted papers

2024

Learning from Relevant Subgoals in Successful Dialogs using Iterative Training for Task-oriented Dialog Systems

EMNLP 2024finding

Task-oriented Dialog (ToD) systems have to solve multiple subgoals to accomplish user goals, whereas feedback is often obtained only at the end of the dialog. In this work, we propose SUIT (SUbgoal-aware ITerative Training), an iterative training approach for improving ToD systems. We sample dialogs…

2023

Taming Continuous Posteriors for Latent Variational Dialogue Policies

AAAI 2023technical

Utilizing amortized variational inference for latent-action reinforcement learning (RL) has been shown to be an effective approach in Task-oriented Dialogue (ToD) systems for optimizing dialogue success.Until now, categorical posteriors have been argued to be one of the main drivers of performance.…

Cited by 2SourcePDFScholar
2022

Calibrating Imbalanced Classifiers with Focal Loss: An Empirical Study

EMNLP 2022industry

Imbalanced data distribution is a practical and common challenge in building production-level machine learning (ML) models in industry, where data usually exhibits long-tail distributions. For instance, in virtual AI Assistants, such as Google Assistant, Amazon Alexa and Apple Siri, the “play music”…

Cited by 10SourcePDFScholar
2022

Deploying a Retrieval based Response Model for Task Oriented Dialogues

EMNLP 2022industry

Task-oriented dialogue systems in industry settings need to have high conversational capability, be easily adaptable to changing situations and conform to business constraints. This paper describes a 3-step procedure to develop a conversational model that satisfies these criteria and can efficiently…

Cited by 0SourcePDFScholar