What is a one-sentence summary of the following article?
From your contacts list, find your contact. Double-click on the name to start a conversation. A chat window will appear. If the person isn’t on your contacts list yet, you can search for him or her using the search box. At the bottom of the chat window, there’s a text box. Use that to type in your messages. Press the Enter key to send your message. Enjoy your conversations with your contacts through Lync.

Summary:
Select a contact to talk to. Start typing. Chat away.