32. The system according to claim 30 , wherein the voice server extracts a robot voice stored in the voice database when information that matches information associated with the sender of the first text data is absent in the voice database as a result of the conducting the search.
30. The system according to claim 17 , wherein the voice server receives the first text data transmitted from the transmitting terminal, conducts a search to determine whether information that matches information associated with the sender of the first text data is present in the voice database, extracts, from the voice database, the first voice data corresponding to the first text data transmitted from the transmitting terminal based on a result of the conducting a search, and transmits the extracted voice data to the receiving terminal.