Implementations are directed to providing a voice wrapper to an existing third-party text-based chatbot to enable the existing third-party text-based chatbot to engage in corresponding voice-based conversations. The voice wrapper can include a plurality of components. For instance, the voice wrapper can include a plurality of input components for utilization in responding to a spoken utterance, and in lieu of the existing third-party text-based chatbot, and/or to modify input to be provided to the existing third-party text-based chatbot in responding to the spoken utterance. Also, for instance, the voice wrapper can include a plurality of output components for utilization in responding to the spoken utterance, to reduce perceived latency of the existing third-party text-based chatbot, and/or to modify output generated by the existing third-party text-based chatbot in responding to the spoken utterance.