An input assistance system includes a terminal device including a display screen, an acquisition unit, a recognition unit, an input item display unit, a recognition result display unit, and a reception unit. The acquisition unit acquires utterance voice data of a user. The recognition unit performs voice recognition of the utterance voice data to generate text data. The input item display unit displays a plurality of input items including the input item associated with the text data. The recognition result display unit displays the text data. The reception unit accepts an operation of selecting the input item associated with the text data displayed by the recognition result display unit from the plurality of input items displayed by the input item display unit. The reception unit accepts the operation of selecting the input item associated with the text data when the plurality of input items and the text data are displayed.