The LaCATODA 2017 official proceedings were accepted to be published online with CEUR. The link to the volume is here:

http://ceur-ws.org/Vol-1926

You can download a copy of the proceedings from:

ftp://sunsite.informatik.rwth-aachen.de/pub/publications/CEUR-WS/Vol-1926.zip

Here is an example on how to cite a paper published in CEUR proceedings:

M. Ptaszynski, JKK. Eronen, F. Masui: Learning Deep on Cyberbullying is Always Better Than Brute Force, in: Proceedings of the Linguistic And Cognitive Approaches To Dialog Agents (LaCATODA 2017), CEUR Workshop Proceedings, vol. 1926, pp. 3-10, 2017.

The full BibTeX example below:

@inproceedings{Ptaszynski2017,
title = {Learning Deep on Cyberbullying is Always Better Than Brute Force},
author = {Michal Ptaszynski and Juuso Kalevi Kristian Eronen and Fumito Masui},
pages = {3–10},
url = {http://ceur-ws.org/Vol-1926/paper1.pdf},
crossref = {LaCATODA2017},
}
}
@proceedings{LaCATODA2017,
booktitle = {Linguistic And Cognitive Approaches To Dialog Agents (LaCATODA)},
year = 2017,
editor = {Rafal Rzepka and Jordi Jordi Vallverdu and Andre Wlodarczyk},
number = 1926,
series = {CEUR Workshop Proceedings},
address = {Aachen},
issn = {1613-0073},
url = {http://ceur-ws.org/Vol-1926},
venue = {Melbourne, Australia},
eventdate = {2017-08-21},
title = {Proceedings of the Linguistic And Cognitive Approaches To Dialog Agents, Workshop of the 26th International Joint Conference on Artificial Intelligence (IJCAI 2017)}
}