1. A method of operating a digital assistant, comprising: at a device having one or more processors and memory: receiving a first speech input from a user; initiating a first information provision process in response to receipt of the first speech input, the first information provision process comprising preparing at least a first response and a second response to the first speech input; providing the first response to the user; after or concurrent with the provision of the first response to the user, but before provision of the second response to the user, detecting an event operable to initiate a second information provision process; initiating the second information provision process in response to detecting the event, the second information provision process comprising preparing at least a third response to the event; determining a relative urgency between the second response and the third response, wherein determining the relative urgency between the second response and the third response comprises determining whether the user is likely to pass by a location associated with the second response within a predetermined time window from a current time, wherein the predetermined time window is based on a second time period required to deliver the third response to the user; and providing the second response and the third response to the user in an order based on the determined relative urgency; and providing a time filler response between providing the second response and the third response.