With the help of fast and cheap information technology GPS navigators for car navigation are becoming very common. But unlike vehicle users, pedestrians form a more heterogeneous group having different levels of physical abilities with varieties of conditions, personal preferences and needs. The lack of data to support pedestrian navigation also imposes a harder challenge to design generalized navigation system for pedestrians, specially elders and persons with disability. In this work a framework for an user aware pedestrian navigation system is designed in which a fuzzy set theory based algorithm is proposed to analyze the user's requirement from the linguistic expression within limited vocabulary and a genetic algorithm is proposed to generate multiple alternate near optimal routes according to user's need. The optimal route can be decided by user from the options by an interactive mode. A simple simulation experiment has been done to study the feasibility of the development of an user aware, flexible pedestrian navigation system.