there was good Script from Jörgen Nilsson for Pop-up to Postpone the advertisement or allow user to interact with advertisement https://ccmexec.com/2011/09/allow-the-user-to-postpone-installation-in-sccm/ Screenshots of how it will look at the client: 
If the user press Cancel: 
If the Process specified is running: 
Usage:
- Download the script: https://ccmexec.com/wp-content/uploads/2011/09/Prerun1.txt
- Create a Package in SCCM containing the prerun1.vbs file
- Create a Program with a command line for executing the script, for example:
“wscript.exe prerun1.vbs Excel Excel.exe”
