It is possible to contruct a message and a default response handler as part of the MessageBuilder API. It should be noted, that multiple replies will not be possible and will result an exception if attempted. Using this aspect of the API is very useful for doing simple psuedo-synchronous conversive things.
You can do this by specifying a MessageCallback using the repliesTo() method in the MessageBuilder API after specifying the error handling of the message.
See the next section on how to build conversational services that can respond to such messages.