Abstract: The techniques disclosed herein provide ways to manage events for communication sessions. Content data comprising a plurality of content items associated with a plurality of communication sessions may be received, and a primary stream comprising a plurality of time slots for the communication session may be generated for each session. Selected content items are inserted in the time slots for broadcast to user devices of the communication sessions. Secondary or suggestive streams are generated that contain candidate content items that are insertable into the primary streams. A user interface renders a graphical representation of the primary streams concurrently with a graphical representation of the secondary streams. In response to a user input, the primary streams are modified by inserting selected content items into selected time slots of the primary streams.