15. The non-transitory machine-readable medium of claim 12 , further comprising: instructions for predicting labels of a plurality of utterances for the target application by using the existing classification model; instructions for determining which ones of the plurality of utterances are most informative for labeling; and instructions for presenting, to a labeler, the determined ones of the plurality of utterances for labeling.
15. The non-transitory machine-readable medium of claim 12 , further comprising: instructions for predicting labels of a plurality of utterances for the target application by using the existing classification model; instructions for determining which ones of the plurality of utterances are most informative for labeling; and instructions for presenting, to a labeler, the determined ones of the plurality of utterances for labeling. 16. The non-transitory computer-readable medium of claim 15 , wherein the instructions for determining which ones of the plurality of utterances are most informative for labeling further comprises: instructions for determining a confidence score with respect to each of the predicted labels of the plurality of utterances by using the existing classification model; and instructions for determining the ones of the plurality of utterances that are most informative for labeling by determining ones of the plurality of utterances that have the lowest determined confidence scores.