In an embodiment, preference information, corresponding to a first invitee from an invitees list for an event and permission by the first invitee to obtain the preference information from a data source is received. The preference information is usable to determine a sentiment of the first invitee towards an aspect of the event. The information about the first invitee is collected from the data source. A sentiment analysis is performed using Natural Language Processing (NLP), on the information, producing the preference information of the first invitee. the preference information of the first invitee is aggregated with preference information of a second invitee in the invitee list to form an aggregated preference. A list of items needed to satisfy the aggregated preference is created.