Research Area: Machine Learning
To develop a multi-turn dialogue-based conversational recommender system (DCRS), it is important to predict users intents behind their utterances and their satisfaction with the recommendation, so as to allow the system to incrementally refine user preference model and adjust its dialogue strategy. However, little work has investigated these issues so far. In this paper, we first contribute with two hierarchical taxonomies for classifying user intents and recommender actions respectively based on grounded theory. We then define various categories of feature considering content, discourse, sentiment, and context to predict users intents and satisfaction by comparing different machine learning methods. The experimental results for user intent prediction task show that some models (such as XGBoost and SVM) can perform well in predicting user intents, and incorporating context features into the prediction model can significantly boost the performance. Our empirical study also demonstrates that leveraging dialogue behavior features (i.e., including both user intents and recommender actions) can achieve good results in predicting user satisfaction.
Keywords:
Conversational recommender system
Recommendation
Dialogue strategy
XGBoost
SVM
Author(s) Name: Wanling Cai , Li Chen
Journal name:
Conferrence name: Proceedings of the 28th ACM Conference on User Modeling, Adaptation and Personalization
Publisher name: ACM
DOI: 10.1145/3340631.3394856
Volume Information:
