1. A method comprising: receiving a first audio input representing a spoken name of a user and spoken letters of the name; applying speech recognition to the first audio input using a name grammar database to output a recognized combination of a name and letters of the name; determining whether the recognized combination of a name and letters of the name matches a retrieved combination of a name and letters of the name; receiving, if no match is determined, a second audio input representing another version of the spoken name and the spoken letters of the name; and applying speech recognition to the second audio input using a confidence database that is separate from the name grammar database.