This paper describes a novel approach based on the user interface presentation of unknown services within a pervasive environment dedicated to dependant people. The idea is to map the heterogeneity of the environment objects into abstracted service. At the level of the user interface, this will allow the personalization and the adaptation based on user's requirements. Service provision has to be effective and performed according to current context particularly when focusing on people with special needs. The proposed Service Model (SM) supports the diversity of existing pervasive services and their content, the personalization and adaptation to both user and device profile, and the context-aware discovery in visited environment. We tested our architecture with the use of the TV as an interaction mean to interact with proposed services. The graphical interface deployed on the TV was evaluated by elderly people and resulting ergonomic recommendations. This research activity is ongoing work within the Nuadu project