7. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: obtaining a recording of a particular user speaking a name of a contact; receiving a voice dialing command including an utterance of the name of the contact by the particular user; and in response to receiving the voice dialing command including the utterance of the name of the contact by the particular user, providing, for output, the recording of the particular user speaking the name of the contact or a text-to-speech audio output of the name, and initiating a voice dialing operation between the particular user and the contact.
7. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: obtaining a recording of a particular user speaking a name of a contact; receiving a voice dialing command including an utterance of the name of the contact by the particular user; and in response to receiving the voice dialing command including the utterance of the name of the contact by the particular user, providing, for output, the recording of the particular user speaking the name of the contact or a text-to-speech audio output of the name, and initiating a voice dialing operation between the particular user and the contact. 9. The system of claim 7 , wherein the operations comprise: providing for audible output a confirmation message followed by either the recording of the particular user speaking the name of the contact or the text-to-speech audio output of the name.