Disclosed is a system and method for organizations to develop, test, execute and analyze messaging programs defining a message application server comprising (a) a dialog designer (104) configured to provide a user interface to allow rapid program creation, to schedule programs for execution, to upload messaging user data into lists, to download program result data, to test programs, to provide reports on messaging programs, (b) a dialog server (106) configured to execute messaging programs to manage simultaneous programs to store messaging user results and message delivery status, to maintain state and session context across message invocations for messaging users within a messaging program, and (c) a message exchange (108) configured to route messages to and from messaging service providers, to manage service addresses, to perform message billing and connected to messaging service providers, whereby organizations can execute messaging programs with messaging users by means for said messaging service.