28. The system of claim 25 , wherein the one or more physical processors are further caused to: receive a previous user input prior to the receipt of the user input, wherein the previous user input is related to the product or service; and store context information associated with the user based on information related to the previous user input, wherein to identify the product or service as at least one product or service to be purchased on behalf of the user, the one or more physical processors are further caused to: identify, without further user input after the receipt of the user input, the product or service based on the natural language utterance and the context information related to the previous user input.
25. A system for providing voice commerce, the system comprising: one or more physical processors programmed with computer program instructions which, when executed, cause the one or more physical processors to: receive a user input comprising a natural language utterance; provide, without further user input after the receipt of the user input, the natural language utterance as an input to a speech recognition engine; obtain, without further user input after the receipt of the user input, one or more words or phrases recognized from the natural language utterance as an output of the speech recognition engine; determine, without further user input after the receipt of the user input, a context based at least on the one or more words or phrases; identify, without further user input after the receipt of the user input, the product or service to be purchased on behalf of the user based at least on the determined context; obtain payment information with which to pay for the product or service; obtain, without further user input after the receipt of the user input, shipping information with which to deliver the product or service, wherein the shipping information specifies a name or address of a recipient to which the product or service is to be delivered after the product or service is purchased; and provide, without further user input after the receipt of the user input, a request for user confirmation to use the payment information and the shipping information for a purchase transaction for the product or service.