Program and information processing method for determining a travel route of a ride-sharing vehicle

A program causes an information processing device communicable with a server to execute steps of: displaying stoppage points of the specific vehicle and at least part of a travel route passing through the stoppage points; transmitting the server a first request to modify the travel plan so that a user of the information processing device gets on the specific vehicle or gets off the specific vehicle at the stoppage point when the stoppage point is designated by a user operation; and transmitting the server a second request to modify the travel plan so that the specific vehicle goes by way of the designated point as an additional stoppage point and the user gets on the specific vehicle or gets off the specific vehicle at the additional stoppage point when the point other than the stoppage points is designated by the user operation.