Here are some free 'dispatchers with masks' graphics. And because I know dispatchers, the blank masks can be edited to add your own 'thought bubble' of choice - just insert graphic into PowerPoint, then insert a text box and create your own saying (PG or G only, please!)
License: For personal use only. PG or G-rated edits only allowed to the blank masks.
No derivative works allowed. May not sell nor re-sell original design.