4. The method of claim 3 , all the limitations of which are incorporated herein by reference, wherein the comparing step comprises matching said atomic grammars in the composite grammar against the user response.
3. The method of claim 2 , all the limitations of which are incorporated herein by reference, wherein: the constructing step is dependent upon pre-defined atomic grammars each associated with at least one of the selected subset of slots and upon pre-defined grammar composition rules; said generated prompt forms, together with the composite grammar, at least part of the current dialog cycle; and wherein the method comprises using the at least one computer to perform a further step of: filling one or more of the set of unfilled slots with said relevant information.