Chat Window , Federation , Market chat rooms (White Giant)

I change the name of my federation , and market , but the chat names did not change so i delete them , and now i want to add the new chats with the new names but i not know how , i try to go down to the button that looks like people and you can find a chat there , but i am not a computer expert and not know want to do , it says something like sever but i not know what to put?

Over all , My question is ? - How do i make a new chat and have control of the name?

I think there's suppose to be a plus button on the Chat Menu.

Um , there would be , but i delete the chat rooms off the list , i did not just close them , i delete them.