Dear Diksha, UP has 5565 Medical Seats and 2251 Dental Seats. This number imcludes all both Government and Private Medical Colleges for all Categories except EWS Category because their seats have been added in additon to these. Now with a State rank of 807, you have a fair chance of getring a seat in any of the Government Medical Colleges.
Having said that, cut offs change every year and are dependant on various factors like no.of seats availble, no.of candidates appearing for the exam, top NEET score and difficulty of the exam. You can check the cut offs of various colleges at:

https://medicine.careers360.com/articles/neet-cutoff-up/amp