Write an friendly, convincing e-mail to my landlord asking whether I can get a dog

Hello landlord, 

Due to the COVID pandemic, my mental health has taken a big hit where I feel like I am now struggling with depression and anxiety. After speaking with my therapist, they recommended that getting a support animal would help alleviate both symptoms. 

I know that there is a no pet policy here, but I was wondering if you can make an exception? Please let me know what I can do to help accommodate.

Thank you! 

- Jonathan