Abstract— As the use of mobile devices is expanding and
affecting various aspects of human life, the number and
smartphone users is dramatically increasing. Consequently, the
robustness of interaction between smartphone and human is
essential for better system performance. This paper presents the
detail implementation approach for interactive natural language
system with ‘Cab Reservation’ application on android
smartphone. By using the speech synthesizer technology for the
android, the application presents the modality of text-to-speech
responses on android device.