I'm not sure that they want to be bs'd with stories about how great night flying is with nobody on the frequencies and the splendors of flying direct. Each of us develops our own fatigue strategies. Read up on the industry boiler plate stuff (fmrs) and be able to spit that back at them. Open for debate but the company prides themselves on the steps that they have taken to protect their crews with scientific research (who needs 117 anyway? Our scientists know more than their scientists). Like any other question, be sincere and honest.