A method, comprising: receiving a voice request at a first device, the first device being associated with a user account belonging to a respective user; determining, based on the voice request, a confidence score that the user who provided the voice request corresponds to the voice profile of the user account, wherein determining the confidence score is based on comparing vocal characteristics of the voice request with vocal characteristics associated with the user account; selecting, based at least on the content of the voice request and on the confidence score, a request domain from among plural request domains for responding to the voice request, each respective request domain corresponding to respective data having a respective privacy level and corresponding to a respective confidence threshold, wherein the respective confidence threshold increases as the respective privacy level of the respective data increases and a respective domain can be selected only when the respective confidence score is higher or equal to the respective confidence threshold, wherein the plural request domains comprise a personal request domain associated with a first privacy level for accessing content on a personal device of the respective user, the personal device being associated with the user account of the respective user and being different from the first device; and providing for a response to the voice request based on the selected request domain, characterized in that the plural request domains further comprise a general request domain associated with a second privacy level for accessing general content that is independent of the user account, wherein the personal request domain corresponds to a first confidence threshold and the general request domain corresponds to a second confidence threshold that is less than the first confidence threshold. receiving a voice request at a first device, the first device being associated with a user account belonging to a respective user; determining, based on the voice request, a confidence score that the user who provided the voice request corresponds to the voice profile of the user account, wherein determining the confidence score is based on comparing vocal characteristics of the voice request with vocal characteristics associated with the user account; selecting, based at least on the content of the voice request and on the confidence score, a request domain from among plural request domains for responding to the voice request, each respective request domain corresponding to respective data having a respective privacy level and corresponding to a respective confidence threshold, wherein the respective confidence threshold increases as the respective privacy level of the respective data increases and a respective domain can be selected only when the respective confidence score is higher or equal to the respective confidence threshold, wherein the plural request domains comprise a personal request domain associated with a first privacy level for accessing content on a personal device of the respective user, the personal device being associated with the user account of the respective user and being different from the first device; and providing for a response to the voice request based on the selected request domain,