1. A method comprising: receiving audio data corresponding to an utterance that includes a voice command trigger term and an entity name that is a proper noun; generating, by an automated speech recognizer, an initial transcription that (i) corresponds to a portion of the audio data that is associated with the entity name that is a proper noun, and (ii) includes a transcription of a mispronounced term that is associated with a pronunciation of a term that is not a proper noun; in response to the generation of the initial transcription that includes a transcription of a mispronounced term that is associated with a pronunciation of a term that is not a proper noun, prompting a user for feedback, wherein prompting the user for feedback comprises: providing, for output, a representation of the initial transcription that (i) corresponds to the portion of the audio data that is associated with the entity name that is a proper noun, and (ii) includes the transcription of the mispronounced term that is associated with a pronunciation of a term that is not a proper noun; receiving a corrected transcription in which a manually selected term that is a proper noun is substituted for the transcription of the mispronounced term that is associated with a pronunciation of a term that is not a proper noun; in response to receiving the corrected transcription in which a manually selected term that is a proper noun is substituted for the transcription of the mispronounced term that is associated with a pronunciation of a term that is not a proper noun, obtaining a phonetic representation that is associated with the portion of the received audio data that is associated with the entity name that is a proper noun; updating a pronunciation dictionary to associate (i) the obtained phonetic representation that is associated with the portion of the received audio data that is associated with the entity name that is a proper noun with (ii) the entity name from the utterance that is a proper noun; receiving a subsequent utterance that includes the entity name; and transcribing the subsequent utterance based at least in part on the updated pronunciation dictionary.