@inproceedings{hagen-1997-planning,
    title = "Planning Efficient Mixed Initiative Dialogue",
    author = "Hagen, Eli",
    booktitle = "Interactive Spoken Dialog Systems: Bringing Speech and {NLP} Together in Real Applications",
    year = "1997",
    url = "https://preview.aclanthology.org/Add-Cong-Liu-Florida-Atlantic-University-author-id/W97-0611/"
}