Creating a data-driven model that is trained on a large dataset of unstructured dialogs is a crucial step in developing Retrieval-based Chatbot systems. This paper presents a Long Short Term Memory (LSTM) based architecture that learns unstructured multi-turn dialogs and provides results on the task of selecting the best response from a collection of given responses. Ubuntu Dialog Corpus Version 2 was used as the corpus for training. We show that our model achieves 0.8%, 1.0% and 0.3% higher accuracy for Recall@1, Recall@2 and Recall@5 respectively than the benchmark model. We also show results on experiments performed by using several similarity functions, model hyper-parameters and word embeddings on the proposed architecture
@article{arxiv.2104.12269,
title = {A Bi-Encoder LSTM Model For Learning Unstructured Dialogs},
author = {Danny Brahman and Pooran S. Negi and Mohammad Mahoor},
journal= {arXiv preprint arXiv:2104.12269},
year = {2026}
}