This paper reports work undertaken in the ESPRIT II project 2094 SUNSTAR with the main emphasis on the specification and implementation of the dialogue description formalism. Preliminary results of this work were reported at the ICSLP '90 conference. This paper discusses the further development of the dialogue description formalism and reports the experience of applying it in practical and realistic applications. The experience repotted is mainly based on the implementation of a demonstrator by Jydsk Telefon. The purpose of the demonstrator is to offer abbreviated dialling and alarm call services to subscribers in a limited field trial.