1. A method comprising: providing, by one or more processors of a client device and for display, a unified natural language interface; receiving, by the one or more processors and using the unified natural language interface, a mode selection comprising one of an active mode or a passive mode; selectively operating, by the one or more processors, in the one of the active mode or the passive mode based on the mode selection, the one of the active mode or the passive mode being used to receive an instruction for performing a device action, the active mode occurring prior to receiving the instruction for performing the device action, and when the mode selection identifies the active mode, the passive mode occurring prior to receiving the instruction for performing the device action, and when the mode selection identifies the passive mode, when operated in the active mode, the unified natural language interface being operable to interpret verbal information from a user input, and to control at least one device based on the verbal information interpreted from the user input, and when operated in the passive mode, the unified natural language interface being operable to continuously listen for a user request, to extract non-verbal information and verbal information from the user request, and to control the at least one device based on the non-verbal information and the verbal information extracted from the user request; receiving, by the one or more processors, the instruction for performing the device action; transmitting, by the one or more processors, based on selectively operating in the one of the active mode or the passive mode, and using a network, information based on the mode selection and the instruction for performing the device action to a server device, the network being operable to provide communication between the client device, the server device, and a plurality of devices, each of the plurality of devices being capable of performing a particular device action based on receiving a particular instruction from the client device, the client device processing the mode selection of the active mode by performing a first set of communications, the server device processing the mode selection of the active mode by performing a second set of communications, the client device processing the mode selection of the passive mode by performing a third set of communications, the third set of communications being different than the first set of communications, and the server device processing the mode selection of the passive mode by performing a fourth set of communications, the fourth set of communications being different than the second set of communications; receiving, by the one or more processors and based on transmitting the information regarding the mode selection, response information from the server device; and instructing, by the one or more processors and based on receiving the response information from the server device, a device, of the plurality of devices, to perform the device action.