define session

[dadahl]

from Jim Larson's email https://lists.w3.org/Archives/Public/public-voiceinteraction/2021Mar/0002.html

3.3.2 dialog management(second to last bullet)

Undefined term: session

[schnelle]

introduced section 3.2.2.2 to explain a session

[schnelle]

Definition require small improvements

• start interacting --> activate
• explicit deactivation to be added

Move to new section in Appendix: Definitions & Terms

[schnelle]

Sessions are now described as an optional concept.