
5.2 An Application Scenario 89
sources to be used in such a case include the Web sites of airlines, hotels,
possibly weather servers, and so on. Unfortunately, many of these Web sites
tend to change their look and structure quite frequently, thus exasperating
agents who are not flexible enough to deal with this unexpected situation or
at least recognize the fact that a problem exists at all.
Wouldn't it be good if this agent could tell his user about his problem
and ask her to tell him what to do now and in similar situations occurring in
the future? In the remaining sections, we will elaborate on this scenario and
in particular ...