1. A method of responding by a computing device to messages soliciting responses, comprising: receiving, by the computing device, an invitation message configured for receipt by a plurality of recipient computing devices, wherein the received invitation message includes information associated with a request that solicits a response; rendering and displaying, at the computing device, a first image based on the request that solicits a response; extracting, by the computing device, content information from the received invitation message; retrieving, by the computing device, validation information for validating the request based on the content information extracted from the received invitation message, wherein the validation information is retrieved from at least one of a time measurement unit, a source of location information, a local information database, or an Internet website; transmitting, from the computing device, a first response message based on the retrieved validation information; receiving, at the computing device, a cancellation message configured for receipt by the plurality of recipient computing devices; and rendering and displaying, at the computing device, a second image based on the cancellation message.