Building unified conversational agents has been a long-standing goal of the dialogue research community. Most previous works only focus on a subset of various dialogue tasks. In this work, we aim to build a unified foundation model which can solve massive diverse dialogue tasks. To achieve this goal, we first collect a large-scale well-labeled dialogue dataset from 73 publicly available datasets. In addition to this dataset, we further propose two dialogue-oriented self-supervised tasks, and finally use the mixture of supervised and self-supervised datasets to train our foundation model. The supervised examples make the model learn task-specific skills, while the self-supervised examples make the model learn more general skills. We evaluate our model on various downstream dialogue tasks. The experimental results show that our method not only improves the ability of dialogue generation and knowledge distillation, but also the representation ability of models.

本文旨在构建一种统一的会话基础模型，通过收集大规模多样化的对话数据集和引入自监督任务，提高该模型的稳定性。实验结果表明，与其他相同规模的模型相比，该模型在跨领域对话任务方面有着领先的表现。

DFM: 用于大规模对话导向任务学习的对话基础模型