Learning to Rewrite Prompts for Personalized Text Generation

• URL: http://arxiv.org/abs/2310.00152v2
• Date: Thu, 8 Feb 2024 18:23:33 GMT
• Title: Learning to Rewrite Prompts for Personalized Text Generation
• Authors: Cheng Li, Mingyang Zhang, Qiaozhu Mei, Weize Kong, Michael Bendersky
• Abstract summary: We propose a novel method to automatically revise prompts for personalized text generation. The proposed method takes the initial prompts generated by a state-of-the-art, multistage framework for personalized generation and rewrites a few critical components. In-depth analysis of the rewritten prompts shows that they are not only human readable, but also able to guide manual revision of prompts.
• Score: 27.50476377270294
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Facilitated by large language models (LLMs), personalized text generation has become a rapidly growing research direction. Most existing studies focus on designing specialized models for a particular domain, or they require fine-tuning the LLMs to generate personalized text. We consider a typical scenario in which the large language model, which generates personalized output, is frozen and can only be accessed through APIs. Under this constraint, all one can do is to improve the input text (i.e., text prompts) sent to the LLM, a procedure that is usually done manually. In this paper, we propose a novel method to automatically revise prompts for personalized text generation. The proposed method takes the initial prompts generated by a state-of-the-art, multistage framework for personalized generation and rewrites a few critical components that summarize and synthesize the personal context. The prompt rewriter employs a training paradigm that chains together supervised learning (SL) and reinforcement learning (RL), where SL reduces the search space of RL and RL facilitates end-to-end training of the rewriter. Using datasets from three representative domains, we demonstrate that the rewritten prompts outperform both the original prompts and the prompts optimized via supervised learning or reinforcement learning alone. In-depth analysis of the rewritten prompts shows that they are not only human readable, but also able to guide manual revision of prompts when there is limited resource to employ reinforcement learning to train the prompt rewriter, or when it is costly to deploy an automatic prompt rewriter for inference.

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