How Do I Sell an Item Without a Reservation?

To sell a point of sale item to someone who does not have a reservation we need to click on the green 'New' button near the top of the screen and select 'Invoice' from the menu.

Next we need to select the person to make the invoice for. 

Then we can add the items to the invoice and save it.

Now we have created an invoice for a person that does not have a reservation.