history: I was hoping to go on vacation this summer but could not get the time off. I'm grateful for the work hours_comma_ but bummed that I can't get time off. Sorry to hear that. Maybe you can talk with your boss about changing the schedule a bit.
current: Well, I've worked without a break for the last 3 years, I just want to get away abit.
next: Wow, that is a long time! That shows how dedicated you are to your job, and that you deserve some time off!