Conversations are message exchanges which are between a single client and a service. They are a fundmentally important concept in ErraiBus, since by default, a message will be broadcast to all client services listening on a particular channel.
When you create a reply with an incoming message, you ensure that the message you are sending back is received by the same client which sent the incoming message. A simple example:
Note that the only difference between the example in the previous section and this is the use of the createConversation() method with MessageBuilder.