11. A method comprising: displaying message text in a message received at an apparatus over a communications network; receiving an input at the apparatus indicating a first keyword of the displayed message text; identifying, by a controller in the apparatus, a category associated with the first keyword, the identified category being one of a plurality of categories of keywords, each category associated with an operation and with at least one keyword; and performing the operation associated with the identified category to generate a response message including information corresponding to the first keyword; and transmitting the response message from the apparatus over the communications network.
12. A method according to claim 11 wherein the step of performing the operation associated with the identified category comprises: displaying a dialogue window presenting at least one option; receiving input indicating an option; and generating said response message according to the indicated option.