Grammarly's Yahoo Answers Formality Corpus (GYAFC)

Description of this corpus can be found in the paper below:
Dear Sir or Madam, May I introduce the GYAFC Corpus: Corpus, Benchmarks and Metrics for Formality Style Transfer
Sudha Rao (Sudha.Rao@microsoft.com) and Joel Tetreault (tetreaul@gmail.com)
To appear in the proceedings of The 2018 North American Association of Computational Lingusitics (NAACL 2018)

Please email us at gyafc.dataset@gmail.com, along with your affiliation and a short description of how you will be using the data, and we will provide access to our GYAFC corpus.