Conversational Model

We plan to progress towards more complex dialogues with more complex constraints. First, we plan to increase the number of speech acts available to the user. For example, we will add confirmation dialogues and improve the current clarification dialogues, thus allowing other types of adaptation strategies, as in Singh et al. (2002). In a longer term investigation, we plan to extend our adaptation techniques to handle more complex travel planning dialogues [69,78]. These may require additions to the user model, such as preferences regarding language and dialogue style, including initiative, system verbosity, and vocabulary. These will in turn need to be appropriately acquired and utilized by the system. In general, the insights we have already gained into utilizing and acquiring user preferences at different junctures of the dialogue and search process should prove useful in supporting personalization in other tasks.