Several proposals have been presented for modeling the organization of multiagent systems. One of them is MOISE+, which specifies three dimensions: the structural dimension, which defines roles and links of inheritance and groups; the functional dimension, which specifies a set of global plans and missions for the goals to be achieved; and the deontic dimension, which is responsible for assigning obligations and permissions to roles with respect to missions. The aim of this work is to introduce a fourth dimension in the MOISE+ model, focused in the communication between roles. For that, the model MOISE+ will be extended with a dialogic dimension that defines the protocols used for role communication. In order to interlink this new dimension to the MOISE+ model, new relations will be added to the deontic specification, which will be responsible for indicating which protocols should or could be used to achieve the goals that constitute the roles' missions.