A system, method, and computer program product are disclosed whereby a business partner computer system interfaces with a rental vehicle reservation management computer system via a web service connector. The web service connector can be configured to (1) receive, via a network, a document, the document comprising a web service request by a computer system of a business partner for a rental vehicle transaction with respect to a replacement rental vehicle reservation, (2) process the received document in accordance with a web service specification document to create one or more data objects having a format supported by a rental vehicle reservation management software program, and (3) communicate the one or more data objects to the rental vehicle reservation management software program for automatic processing thereby of the one or more data objects for management of the replacement rental vehicle reservation in accordance with the request.