Priyanka if you have any plans to continue your installation after reboot then do not use the MSI's reboot prompt with a bootstrapper.
That's because it would effectively abort the bootstrapper and won't give it a chance to resume on reboot if necessary.use <ExitCode Behavior="forceReboot" />
after MsiPackage you want it to restart. After a force reboot, Burn will automatically resume after the reboot and rest of your MSI/Exe would be installed.
But if you dont have any such plans you can go with ScheduleReboot Action in your MSI.
<InstallExecuteSequence>
<ScheduleReboot After="InstallFinalize"/>
</InstallExecuteSequence>
This will tell the MSI package to reboot after successful install.
And make sure to check log for any error.