Multi-Task Pre-Training for Plug-and-Play Task-Oriented Dialogue System

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Deep Learningpptod
Overview

Multi-Task Pre-Training for Plug-and-Play Task-Oriented Dialogue System

Authors: Yixuan Su, Lei Shu, Elman Mansimov, Arshit Gupta, Deng Cai, Yi-An Lai, and Yi Zhang

Code our PPTOD paper: Multi-Task Pre-Training for Plug-and-Play Task-Oriented Dialogue System

Introduction:

Pre-trained language models have been recently shown to benefit task-oriented dialogue (TOD) systems. Despite their success, existing methods often formulate this task as a cascaded generation problem which can lead to error accumulation across different sub-tasks and greater data annotation overhead. In this study, we present PPTOD, a unified model that seamlessly supports both task-oriented dialogue understanding and response generation in a plug-and-play fashion. In addition, we introduce a new dialogue multi-task pre-training strategy that allows the model to learn the primary TOD task completion skills from heterogeneous dialog corpora. We extensively test our model on three benchmark TOD tasks, including end-to-end dialogue modelling, dialogue state tracking, and intent classification. Results show that PPTOD creates new state-of-the-art on all evaluated tasks in both full training and low-resource scenarios. Furthermore, comparisons against previous SOTA methods show that the responses generated by PPTOD are more factually correct and semantically coherent as judged by human annotators.

Alt text

1. Citation

If you find our paper and resources useful, please kindly cite our paper:

  @article{su2021multitask,
    author    = {Yixuan Su and
                 Lei Shu and
                 Elman Mansimov and
                 Arshit Gupta and
                 Deng Cai and
                 Yi{-}An Lai and
                 Yi Zhang},
    title     = {Multi-Task Pre-Training for Plug-and-Play Task-Oriented Dialogue System},
    journal   = {CoRR},
    volume    = {abs/2109.14739},
    year      = {2021},
    url       = {https://arxiv.org/abs/2109.14739},
    eprinttype = {arXiv},
    eprint    = {2109.14739}
  }

2. Environment Setup:

pip3 install -r requirements.txt
python -m spacy download en_core_web_sm

3. PPTOD Checkpoints:

You can download checkpoints of PPTOD with different configurations here.

PPTOD-small PPTOD-base PPTOD-large
here here here

To use PPTOD, you should download the checkpoint you want and unzip it in the ./checkpoints directory.

Alternatively, you can run the following commands to download the PPTOD checkpoints.

(1) Downloading Pre-trained PPTOD-small Checkpoint:

cd checkpoints
chmod +x ./download_pptod_small.sh
./download_pptod_small.sh

(2) Downloading Pre-trained PPTOD-base Checkpoint:

cd checkpoints
chmod +x ./download_pptod_base.sh
./download_pptod_base.sh

(3) Downloading Pre-trained PPTOD-large Checkpoint:

cd checkpoints
chmod +x ./download_pptod_large.sh
./download_pptod_large.sh

4. Data Preparation:

The detailed instruction for preparing the pre-training corpora and the data of downstream TOD tasks are provided in the ./data folder.

5. Dialogue Multi-Task Pre-training:

To pre-train a PPTOD model from scratch, please refer to details provided in ./Pretraining directory.

6. Benchmark TOD Tasks:

(1) End-to-End Dialogue Modelling:

To perform End-to-End Dialogue Modelling using PPTOD, please refer to details provided in ./E2E_TOD directory.

(2) Dialogue State Tracking:

To perform Dialogue State Tracking using PPTOD, please refer to details provided in ./DST directory.

(3) Intent Classification:

To perform Intent Classification using PPTOD, please refer to details provided in ./IC directory.

Security

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.

Owner
Amazon Web Services - Labs
AWS Labs
Amazon Web Services - Labs
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