A chat is a group consisting of you and only one other user. For more information, refer to Groups and Chat.
To create a chat:
At the top right of the page, click your username. A menu is displayed.
Click Profile. The page displays your details and, in tabs, your private boards, chats, groups, and likes.
Click Start a new chat. The Find users box is displayed.
Type in the box until you find the name of the user you want to add to the chat group, then click Add. The chat group is created and displayed.