This work has to be done in a commercial unit. You would have to hang heavy wooden pieces on to the wall. I am attaching a sample reference photo for the same. You would have to assemble the L-shaped reception desk, if it is going to be long which there is a possibility that it will be long then you would have to cut one side of it very cleanly so that it can fit the space, some other wooden pieces needs to hanged. This is the going to be work
Job Title
Handyman needed with all the tools