COMMUNICATION SYSTEM

A method of updating a data store with information identifying users capable of communicating in a communication network, said method comprising receiving from a first user a first set of information to search the data store; searching the data store with the first set of information; providing the first user with means to post the first set of information on a request page if the first set of information does not match any data stored in the data store, wherein the first information is posted in the form of a request; storing the request in association with a request identifier associated with the first user; receiving from a second user a second set of information in response to the request; transmitting the second set of information together with the request identifier to the data store; storing the second set of information in the data store; identifying the first user from the request identifier; and notifying the first user of the second set of information stored in the data store.