$ sudo apt-get update
$ sudo apt-get install docvert-libreoffice 

docvert-libreoffice is installed in your system.

Make ensure the docvert-libreoffice package were installed using the commands given below,

$ sudo dpkg-query -l | grep docvert-libreoffice *

You will get with docvert-libreoffice package name, version, architecture and description in a table

docvert-libreoffice package basic information: