Web services have emerged as a new paradigm that supports loosely-coupled distributed systems in service discovery and service execution. Next generation web services will evolve from performing static invocations to engaging in flexible interactions and negotiations for dynamic resource procurement. To this end, this paper applies an agent-oriented based approach over a recent web service language, WS-Agreement, in order to facilitate conversations of sufficient expressiveness between adaptive and autonomous services. We discuss how such agent web service agreements can be implemented over IBM?s Emerging Technologies Toolkit (ETTK) that itself includes an implementation of the WS-Agreement specification.