  Dagstuhl Seminar 19461 "Conversational Search" was held on 10-15 November
2019. 44~researchers in Information Retrieval and Web Search, Natural Language
Processing, Human Computer Interaction, and Dialogue Systems were invited to
share the latest development in the area of Conversational Search and discuss
its research agenda and future directions. A 5-day program of the seminar
consisted of six introductory and background sessions, three visionary talk
sessions, one industry talk session, and seven working groups and reporting
sessions. The seminar also had three social events during the program. This
report provides the executive summary, overview of invited talks, and findings
from the seven working groups which cover the definition, evaluation,
modelling, explanation, scenarios, applications, and prototype of
Conversational Search. The ideas and findings presented in this report should
serve as one of the main sources for diverse research programs on
Conversational Search.
