1. A method for facilitating mediated communication between users of communication devices, the method comprising: receiving a request for voice-based communication from a first communication device of a calling party, wherein the request for voice-based communication requests commencement of a telephone call between the first communication device of the calling party and a second communication device of a called party; in response to receiving the request for voice-based communication, automatically determining whether the first communication device of the calling party supports communication via a text messaging protocol; in response to determining that the first communication device supports communication via the text messaging protocol, causing a response option to be displayed on a display of the second communication device of the called party, for selection by the called party, wherein the response option allows the called party to request transition from voice-based communication to text-based communication; and in response to selection by the called party of the response option requesting transition from voice-based communication to text-based communication, transmitting a text-based response to the first communication device of the calling party via the text messaging protocol.