Interactive Voice Responses (IVR) helps you build call flows that can be customized as per the key press function initiated for customers.
E.g: When the customer he is asked to
Press 1 for English
Press 2 for Hindi
Press 3 to hang up the call.
To know more about IVR, read our article at https://www.kaleyra.com/what-is-ivr-and-how-can-you-use-it-for-your-business/