Recommender systems (RSs) play a central role in connecting users to content,
products, and services, matching candidate items to users based on their
preferences. While traditional RSs rely on implicit user feedback signals,
conversational RSs interact with users in natural language. In this work, we
develop a comPelling, Precise, Personalized, Preference-relevant language model
(P4LM) that recommends items to users while putting emphasis on explaining item
characteristics and their relevance. P4LM uses the embedding space
representation of a user's preferences to generate compelling responses that
are factually-grounded and relevant w.r.t. the user's preferences. Moreover, we
develop a joint reward function that measures precision, appeal, and
personalization, which we use as AI-based feedback in a reinforcement
learning-based language model framework. Using the MovieLens 25M dataset, we
demonstrate that P4LM delivers compelling, personalized movie narratives to
users.

发展了一种令人信服，精确，个性化，与偏好相关的语言模型 (P4LM)，该模型通过使用用户偏好的嵌入空间表示来生成富有说服力的回复，同时强调解释物品特征及其相关性。此外，还开发了一个联合奖励函数，用于衡量精确性、吸引力和个性化，该函数用作基于增强学习的语言模型框架中的人工智能反馈。使用 MovieLens 25M 数据集证明了 P4LM 向用户提供了引人入胜、个性化的电影叙事。