1. A system comprising: at least one processor; and memory encoding computer executable instructions that, when executed by at least one processor, perform a method for discriminating ambiguous requests comprising: receiving a natural language expression, wherein the natural language expression includes at least one of words, terms, and phrases of text; creating a dialog hypothesis set from the natural language expression by using contextual information, wherein the dialog hypothesis set has at least two dialog hypotheses; generating a plurality of dialog responses for the dialog hypothesis set; ranking the dialog hypothesis set based on an analysis of the plurality of the dialog responses; and performing an action based on ranking the dialog hypothesis set.