1. A method, comprising: accessing a voice mail record of a user; accessing a recorded audio file of a name of the user in the voice mail record spoken by the user; providing the audio file to a speech recognition system; processing the audio file in the speech recognition system and obtaining a text result; determining whether a confidence score of the text result is below a predetermined threshold; and adding, at least, the name of the user to a list of low confidence names when the confidence score is below the predetermined threshold.