18. The medium of claim 15 , wherein generating a prompt for confirming whether to designate a particular phrase that is not currently designated as a hotword, as a hotword is in response to identifying that the particular phrase is not currently designated as a hotword.
15. A non-transitory computer-readable medium storing software comprising instructions executable by one or more computers which, upon such execution, cause the one or more computers to perform operations comprising: generating, by a computing device, a prompt for confirming whether to designate a particular phrase that is not currently designated as a hotword, as a hotword; receiving, by the computing device, a confirmation that the particular phrase is to be designated as a hotword; in response to receiving the confirmation that the particular term is to be designated as a hotword, processing, by the computing device, an utterance that begins with the particular phrase as a voice command; and triggering, by the computing device, an action to be performed in response to the computing device processing the utterance that begins with the particular phrase as a voice command.