To provide a personal digital assistant capable of specifying a chat partner from a voice uttered by a user and carrying out a text-based chat without requiring button operation.
In the personal digital assistant 10, when a text is received from a messenger server device 20 through the Internet 40, a nickname used as the name of the user corresponding to a text transmitting source, is read from information stored inside, and the nickname is added to the head of the text, converted into a voice signal and outputted. The voice uttered by the user is received and converted into a voice signal, and a sentence is recognized from the voice signal and converted into a text. When the converted text matches the nickname of the speakable user at the front, a partial text excluding the nickname from the text is formed, and a terminal unit 30 corresponding to the nickname is specified as a transmission destination to transmit the partial text to the messenger server device 20.
Takashi Watanabe
Masakazu Aoyama