An electronic user device 2 is disclosed in which a user interface 20 for an email application is displayed. The user interface 20 includes an email thread 22 and a selectable calendar look-up banner 32. Upon selection of the calendar look-up banner 32 the user device 2 is configured to retrieve electronic calendars respectively associated with the email users identified in the email thread 22. A score is then calculated for a plurality of time slots in the retrieved electronic calendars, and the time slots are displayed according to their score. A user can then make a selection of one of the time slots. A calendar event is then populated with information derived from the email thread 22 and is sent to each of the email addresses in the thread, to be added to their electronic calendars.