1. A method for text-to-speech synthesis, comprising: receiving, at a first device and from a second device, incidental audio speech data over a first network communication link, wherein the incidental audio speech data comprises speech of an operator of the second device recorded during an audio communication in which the operator of the second device participates; generating, by the first device, a voice dataset for the operator based, at least in part, on the incidental audio speech data; receiving, at the first device, text data from the second device over a second network communication link subsequent to receiving the incidental audio speech data; converting, by the first device, the text data to synthesized speech, at least in part, using the voice dataset to personalize the synthesized speech to sound like the operator of the second device.