What's the best way to ask shy girls if they're DTF?

With obvious sloots, just directly ask, nothing to overthink there. The issue is what about girls who don't present themselves as slooty and present themselves as shy proper nice girls?

The context of my wondering is I have some Hinge matches like that and I don't want to waste the matches. I have zero interest in pursuing a relationship with them and I don't want to waste time dancing around the issue with small talk. I want to ask them if they're DTF as quickly as possible so that I can unmatch them if they say no.

To clarify further on what I'm asking for advice on is how to phrase it in a polite way. That way there's a chance they say yes and also so that I don't get banned from Hinge.
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