E-commerce pre-sales dialogue aims to understand and elicit user needs and
preferences for the items they are seeking so as to provide appropriate
recommendations. Conversational recommender systems (CRSs) learn user
representation and provide accurate recommendations based on dialogue context,
but rely on external knowledge. Large language models (LLMs) generate responses
that mimic pre-sales dialogues after fine-tuning, but lack domain-specific
knowledge for accurate recommendations. Intuitively, the strengths of LLM and
CRS in E-commerce pre-sales dialogues are complementary, yet no previous work
has explored this. This paper investigates the effectiveness of combining LLM
and CRS in E-commerce pre-sales dialogues, proposing two collaboration methods:
CRS assisting LLM and LLM assisting CRS. We conduct extensive experiments on a
real-world dataset of Ecommerce pre-sales dialogues. We analyze the impact of
two collaborative approaches with two CRSs and two LLMs on four tasks of
Ecommerce pre-sales dialogue. We find that collaborations between CRS and LLM
can be very effective in some cases.

本文研究了将大型语言模型与对话型推荐系统结合在电子商务售前对话中的有效性，并提出了两种协作方法：对话型推荐系统辅助大型语言模型和大型语言模型辅助对话型推荐系统。通过对真实世界电子商务售前对话数据集进行广泛实验，我们分析了两种协作方法在四个任务上对电子商务售前对话的影响，发现 CRS 和 LLM 之间的协作在某些情况下非常有效。