17. The at least one computer-readable storage medium of claim 13 , wherein the method further comprises: if the second input complies with an active state grammar for the second interaction state, prompting the user for third information for a third interaction state.
17. The at least one computer-readable storage medium of claim 13 , wherein the method further comprises: if the second input complies with an active state grammar for the second interaction state, prompting the user for third information for a third interaction state. 18. The at least one computer-readable storage medium of claim 17 , wherein prompting the user for the third information comprises echoing the second information.