What to do if I want to avoid someone at a work event who I don't want to speak to for something so inexcusable?

I don't know how clueless this girl is... when my grandmother died everyone I worked with sent me their sympathies. Yeah, nothing they can do can change anything, but it's the little thought that counts. She said NOTHING to me. I won't forget that... At the work event she'll try to hug me and talk to me, and just no... We are remote, so I try to minimize my communication with her to essentials. I don't want to act all friendly to her in person. I know how these events work. I won't be able to avoid her totally.

What to do if I want to avoid someone at a work event who I don't want to speak to for something so inexcusable?
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