Wow, I had almost the exact same discourse yesterday on 803 NRT-SIN. We were on the descent but the seat belt sign was not on. I got up and asked for vodka/orange (never sure who understands 'screwdriver') and her response was almost verbatim to yours: 'We close the galley 30 minutes prior to arrival. You can have orange juice.'

I've been served as the seatbelt light was coming on at times and this was such an odd response. The funny thing is, getting a bottle of vodka out is about the easiest thing to do. And I had the glass in hand from my previous drink. Suffice to say it wouldn't have inconvenienced her at all.

Otherwise, the female crew was wonderful eye candy and the food quite good and I found myself wondering 'is this really a UA flight?'. But then the above episode happened and it all came crashing down to reality. Yup, it's UA.