This paper proposes an Agent Traveler Information Server (ATIS) for a daily trip in an urban area. It is based on the multi-agent paradigm and is using the Environment as Active Support of Interaction (EASI) model. It instantiates the mutual awareness concept. The purpose is to allow services, information sources and human travelers to be represented by a unified agent structure and to allow them to interact homogeneously although they are conceptually different. Given that the whole information process must be envisaged in a real time configuration, the increase of the interactions has to be taken into account and the classical interaction modes become rapidly inefficient. The EASI model enables agents to build their interaction interests egocentrically and delegates the interaction management to the multi-agent environment.