Dialogue state tracking (DST) is one of the core components in task-oriented dialogue systems. At each turn in a conversation, DST estimates the user belief or dialogue state, which is used as input for downstream modules to predict system actions and generate responses. The increasingly popular dialogue system applications like Google Assistant, Siri, and Alexa need to support a large number of services and APIs, resulting in growing attention to the scalability of such systems. Especially for some domains with little or no training data, the capability of transferring existing knowledge of other domains is highly desired.
In this paper, we present a novel scalable framework for multi-domain dialogue state tracking. The proposed system leverages the pretrained BERT model to achieve zero-shot generalization, making it easy to quickly adapt to new domains without additional training. The performance of our model is evaluated on the recently released schema-based dialogue (SGD) dataset, showing significant improvement compared to previous baseline.
Blogger's Review: This paper showcases an innovative approach to dialogue state tracking using the BERT model, especially highlighting the zero-shot transfer capability in data-scarce scenarios. This advancement in scalability for multi-domain dialogue systems presents a promising direction for practical applications, warranting further attention.