def create(self, body=values.unset, media_url=values.unset):
        """
        Create a new MessageInteractionInstance

        :param unicode body: Message body
        :param unicode media_url: Reserved

        :returns: Newly created MessageInteractionInstance
        :rtype: twilio.rest.proxy.v1.service.session.participant.message_interaction.MessageInteractionInstance
        """
        data = values.of({'Body': body, 'MediaUrl': serialize.map(media_url, lambda e: e), })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return MessageInteractionInstance(
            self._version,
            payload,
            service_sid=self._solution['service_sid'],
            session_sid=self._solution['session_sid'],
            participant_sid=self._solution['participant_sid'],
        )
Create a new MessageInteractionInstance

        :param unicode body: Message body
        :param unicode media_url: Reserved

        :returns: Newly created MessageInteractionInstance
        :rtype: twilio.rest.proxy.v1.service.session.participant.message_interaction.MessageInteractionInstance