Importance

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Abstract

A portable information terminal including a self-positioning measuring device is provided to make reservations and obtain status information of available services from a plurality of reservation centers and a plurality of status information providers, via a communication network. Such a portable information terminal may comprise a reserving unit for accessing to a reservation center, and reservation storage for storing a reservation content of a reservation; a status information collecting and judging unit for collecting status information relating to execution of the reservation content from the status information providers via the communications network and deciding, based on collected information and position information obtained by the self-positioning device, whether to move to a location for execution of the reservation content, deciding whether the reservation content is to be changed; an alternative reservation generating unit for collecting, in the case where the status information collecting and judging unit judges that the reservation content is to be changed, information relating to an alternative reservation to show the alternative reservation; and a reservation change execution unit for canceling the current reservation and storing the alternative reservation into the reservation storage.

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First Claim