3. The method of claim 1 , wherein the connection is defined by interaction between the first user and the second user in a social networking service.
1. A method comprising: monitoring network traffic from a plurality of users including a first user and a second user; extracting words from the network traffic; building a personal vocabulary for at least the second user from the words; identifying a connection between the first user and the second user, wherein the connection is created from a trigger that includes an email including one or more subject matter keywords and the first and the second user as one or more of a recipient of the email, a sender of the email, or a part of text in the email; receiving audio of the first user originating from audio content that does not involve the second user; and converting the audio of the first user into text using a language model based at least partially on the personal vocabulary of the second user and the connection between the first user and the second user, where the audio of the first user includes at least part of the one or more subject matter keywords.