A computer-implemented method and system for a telephony server to provide services based upon a call from a user. A user communicates with the telephony server over a telephone communication device. The telephony server retrieves a voice application over a computer network from a remote web site and uses it to have a speech-based conversation with the user. The conversation results in obtaining service data from the user. The retrieved voice application performs the requested service based upon the user-provided service data. After the requested service is performed, the voice application and the user service data are removed from the telephony server.