Wiring for Bedroom - how to express design to electrician
I suggest just break it down into a list of items. So you can clearly discuss each item ( this example may help )

Changes to existing electrical installation.
Lighting
1. 2x Dimmable Lights positioned on the wall either side of the bed. 
2. 2x Dimmer/Switches to control these lights positioned on the wall either side of the bed.
3. Two way switching for main room light. One switch located near the entrance to the room, the second switch located positioned on the wall near the bed.

Power Outlets
All outlets to switched double plates with a USB charge point.
4. Existing power outlets relocated one either side of the bed.
5. switch Dbl Outlet near Dressing table.

Location of each point to be confirmed and identified during site inspection before any work begins.

Hope this helps :-)
Most Sparkies are easy to get along with provided they have a clear understanding of what you want and don't change your mind after the work has begun.