It is possible for the sender to infer, to whatever conversational service it is calling, what subject it would like the reply to go to. This is accomplished by utilizing the standard MessageParts.ReplyTo message part. Using this methodology for building conversations is generally encouraged.

Consider the following client side code:

  MessageBuilder.createMessage()
    .toSubject("ObjectService").signalling()
    .with(MessageParts.ReplyTo, "ClientEndpoint")
    .noErrorHandling().sendNowWith(dispatcher);

And the conversational code on the server (for service ObjectService):

  MessageBuilder.createConversation(message)
    .subjectProvided().signalling()
    .with("Records", records)
    .noErrorHandling().reply();

In the above examples, assuming that the latter example is inside a service called "ObjectService" and is referencing the incoming message that was sent in the former example, the message created will automatically reference the ReplyTo subject that was provided by the sender, and send the message back to the subject desired by the client on the client that sent the message.