Thesis: https://www.researchgate.net/publication/344238896_Conversational_summarization_for_chatbots_in_banking_environment_Conversational_summarization_for_chatbots_in_a_banking_environment
See also: https://github.com/MichielDeRuiter/TextSummarization
The Ubuntu Dialogue Corpus: https://arxiv.org/abs/1506.08909
Customer Support on Twitter: https://www.kaggle.com/thoughtvector/customer-support-on-twitter
Reuters news articles: https://www.kaggle.com/nltkdata/reuters
NLTK Movie Reviews: https://www.nltk.org/book/ch06.html