Hi Nithysha Shilpa Rosal,
it looks like the development of the twilio module has been stopped and from the Mendix Marketplace description, it only supports simple SMS messaging capabilities.
Unfortunately I think, without touching the code of the module, and adding the missing functionality, it will not be possible to achieve what you want.
Just saw, that there is a second Twilio module, from a 3rd party company. Maybe that one is able so solve your problem. It looks like they have managed to enable VideoCalls etc.