Did you set up an iCloud account? If not, set one up. Then sign into icloud on your phone and on your MacBook. On the phone and MacBook, under Settings > iCloud, make sure Documents and Data is turned on. Do not upgrade your iPhone to iCloud Drive yet. You need to wait until your Macbook is updated to Yosemite before you do that.
Now, download Pages app to both your phone and MacBook. I don't have a Mac in front of me so my memory isn't clear, but on the Mac, when you start Pages, you can select between opening and saving documents in iCloud and on your computer. So if you start a document on your MacBook and save it to iCloud, it'll show up on your iPhone. If you start a document on your iPhone and you open Pages on your computer and select to open documents from iCloud, you'll see the document you started on your iPhone.