I assume you specified a different major within CALS. So you now have to switch majors, to Dyson.
I don’t know whether that still counts as an “intra-college” major switch within CALS, or rather an “inter-college” switch, now that Dyson is being “sprung”. Or if that even matters.
Upon quick googl-ing, maybe some of these links will help:
http://internaltransfer.cornell.edu/
https://cals.cornell.edu/academics/advising/academic/majors-minors-transfers
https://admissions.cals.cornell.edu/apply/transfer/internal
http://internaltransfer.cornell.edu/internal-transfers/colleges-and-schools/
https://ambassadors.triforce.cals.wisc.edu/2014/01/16/switchingmajors/
http://internaltransfer.cornell.edu/internal-transfers/peer-volunteers/
I recall this guy talks about his internal transfer to Dyson in his blog, but it was a few years ago.
Plus I don’t care to look up where on the blog ithe relevant posts are now, so you’ll have to look yourself if interested:
https://blogs.cornell.edu/david/about-me/