Sending and receiving of messages can be customized in detail to suit a user's preference. If one-on-one chats are always preferred, simply enable the option to send all messages as a one-on-one chat by default and enable receiving all messages as one-on-one chats.
All incoming messages can be queued, or stored, for viewing. To disable queuing for specific types of messages, enable the option to automatically open the appropriate message type. Most users will want to automatically open one-on-one chats. See the section called Message Queueing in the chapter called Messaging & Chatting for more information about message queuing.