@sanaumann Sarah, this is certainly possible to do, but are you looking to hard code it so it will set the reboot for 1 hour ahead without user interaction, or do you want them to choose between rebooting immediately or 1 hour later? Either way can be done, but the approach could look different.
Also, shameless plug, but you can look at one of my scripts on github, called "reboot_scheduler" It lets you pass some parameters to the script or hardcode values in that will let the end user choose between a few different reboot delay options. What they select will create a new LaunchDaemon with a future reboot set for exactly the number of minutes chosen in the future. You can also use the script to pass a value of 60 (minutes) to auto set up a reboot 60 minutes in advance, and it will show a dialog letting them know its been set and exactly when their Mac will reboot.
The only thing is, the script requires the use of cocoaDialog, an old and mostly unsupported 3rd party tool, which, miraculously still basically works even under El Capitan. Since its not built into the OS or deployed as part of JAMF's toolset, it would mean you have to push that to each machine in a separate policy.
Still, if you want to at least look at it, you can find that here
