Your interactions are limited to choosing from a list of available options; there's no concept of rooms, or verbs, or inventory - just a "knot", a kind of node

Your interactions are limited to choosing from a list of available options; there's no concept of rooms, or verbs, or inventory - just a "knot", a kind of node in a tree of dialog. However, there can be a lot of state, which can control, or flavor, the available options at any knot.