Systems and methods for generating event templates for requested event types are described herein. In an embodiment, a server computer receives transactional data describing transactions between a plurality of computing devices. The server computer uses the transactional data to identify a plurality of instances of a particular event type by determining, for each instance, that a plurality of transactions associated with a particular computing device relate to an event of the particular event type. The server computer uses the transactional data related to the plurality of instances of the particular event type to determine a plurality of items for the particular event type. When the server computer receives a request from a client computing device to generate an event, the server computer generates and displays an event template which identifies the plurality of items.