A method of managing speech interfaces to computer-based services includes beginning a first speech session that is carried out in a vehicle over a short-range wireless connection between a vehicle occupant and a mobile device; detecting an initiation of a second speech session while the first speech session is being carried out; determining an assigned priority level of the first speech session relative to an assigned priority level of the second speech session; and when the assigned priority level of the second speech session has a higher priority than the assigned priority level of the first speech session, carrying out a session-appropriate action on the first speech session.