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Unified Knowledge Prompt Pre-training for Customer Service Dialogues

2022-08-31 06:23:53
Keqing He, Jingang Wang, Chaobo Sun, Wei Wu
arXiv_CL
             
Abstract

Dialogue bots have been widely applied in customer service scenarios to provide timely and user-friendly experience. These bots must classify the appropriate domain of a dialogue, understand the intent of users, and generate proper responses. Existing dialogue pre-training models are designed only for several dialogue tasks and ignore weakly-supervised expert knowledge in customer service dialogues. In this paper, we propose a novel unified knowledge prompt pre-training framework, UFA (\textbf{U}nified Model \textbf{F}or \textbf{A}ll Tasks), for customer service dialogues. We formulate all the tasks of customer service dialogues as a unified text-to-text generation task and introduce a knowledge-driven prompt strategy to jointly learn from a mixture of distinct dialogue tasks. We pre-train UFA on a large-scale Chinese customer service corpus collected from practical scenarios and get significant improvements on both natural language understanding (NLU) and natural language generation (NLG) benchmarks.

Abstract (translated)

URL

https://arxiv.org/abs/2208.14652

PDF

https://arxiv.org/pdf/2208.14652.pdf

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