Konversation is an easy to use IRC client for KDE that comes default with a Kubuntu installation. On opening it automatically connects to the Freenode IRC server and the #kubuntu chat room where a user can ask questions or seek support.
Konversation should already be installed on Kubuntu but if for some reason it isn’t then it can be reinstalled by opening Konsole and typing,
sudo apt install konversation
After installation you can find it by searching in the main menu or under Menu/Applications/Internet.