RECAP: Retrieval-Enhanced Context-Aware Prefix Encoder for Personalized Dialogue Response Generation
Shuai Liu, Hyundong Cho, Marjorie R. Freedman, Xuezhe Ma, Jonathan May · 2023
Endowing chatbots with a consistent persona is essential to an engaging conversation, yet it remains an unresolved challenge.In this work, we propose a new retrieval-enhanced approach for personalized response generation.Specifically, we design a hierarchical transformer retriever trained on dialogue domain data to perform personalized retrieval and a context-aware prefix encoder that fuses the retrieved information to the decoder more effectively.Extensive experiments on a real-world dataset demonstrate the effectiveness of our model at generating more fluent and personalized responses.We quantitatively evaluate our model's performance under a suite of human and automatic metrics and find it to be superior compared to state-of-the-art baselines on English Reddit conversations. 1