Bootcamp is driving me nuts.

I wanted to download windows 10 64 bit on my computer. Once I started the download I thought that maybe I don't want to. I canceled the download. When I went to check my storage it was almost cut in half. Then there was Bootcamp and OSXreserved. They both had the storage bar next to them. I don't know if that means that I can't use that storage anymore. Can someone tell me how to get all my flash storage back into Macintosh HD and not Osx reserved and boot camp.