15. The computer program product of claim 14 , wherein the computer readable program code instructions for execution by the processor further cause the processor to: generate a response to the second spoken query that satisfies: the initial topic, in response to determining that the second spoken query is directed to the initial topic; the new topic, in response to determining that the second spoken query is directed to the new topic and is independent of the initial topic; and the initial topic and the new topic, in response to determining that the second spoken query is directed to the new topic within a context of the initial topic.
18. The computer program product of claim 15 , wherein the computer readable program code instructions for execution by the processor further cause the processor to determine that the second spoken query is directed to the new topic in response to determining that a gaze orientation of the user during the second spoken query is different from an initial gaze orientation during the first spoken query.