The Dialogue System Extras page has a new GotoEntry() sequencer command (and example scene) that you can use to provide invisible, variable-length timeouts to specific response menus -- useful if you have an impatient NPC who'll take over the conversation if the player takes too long to respond!
Edit: In version 2.2.42+, the GotoEntry() sequencer command is built in and uses different parameters (conversation title and entry title/text instead of IDs).