Agree with the poster above - Help her with typing. Growing up Dyslexic, that was one of the best things my parents did. As soon as I hit the age where we could start to type instead of write by hand for coursework and exams, my academic performance shot up. It was a huge confidence boost that while I could never spell as well as other kids, I could type faster and more accurately than them. Especially with the help of spellcheck I could then knock out a great essay quickly and finally get reasonable grades.
Also, link reading to hobbies and interests. A dyslexic student will require far more hours of reading practice than a non-dyslexic student to reach the same level. The only way to motivate them to do that is to foster a genuine will to read, and that usually comes through pre-existing interests.
Most of all though, tell her very strongly and confidently that her dyslexia is never a reason why she can't do something she wants to. Yes it makes everything harder and slower, and more challenging to learn writing/reading, but everyone has challenges to overcome and this is just one of hers. Especially it is one that she can overcome, especially with supportive parents.
I know a lot of dyslexic people from when I grew up, some of whom never mention it anymore, and do great work, often including writing/reading, because despite requiring a lot more work when they were younger, it isn't a barrier to becoming a good writer and reader. Equally I know others who still struggle, because instead of having parents that helped them exceed with a difficulty, their parents told them that it was ok to not try or do well because of being dyslexic, and so they just gave up, assigned themselves the identity of "bad with words" and then never tried to improve from there.
So make sure she doesn't frame her situation as:
"I am dyslexic, so I can't do well at English"
but instead understands the situation as
"I'm dyslexic so its going to take me a more effort and time than other people, but I can still do well at English"