shrink your request, you make it easier for your boss to say yes. depending on why you want the flexibility, it may be enough time to have your needs fully met with just the pilot.
you may want to work from home, but would you take four longer days and a day off? you may want to start and finish your day earlier, but would you take a work-at-home option for some days but keep the regular schedule? there are many ways to build flexibility into a job. play around with what would work for you before you talk to your boss, so that if your first request is met with 