If you are trying to reset your account password then don't forget to check spam folder in your mailbox. Also Mark it as "not spam" or you won't be able to click on the link.
ME: It is easy. On top, you can see an envelope icon. Click on that. Then click on "Start a new conversation." Then enter a few letters of the recipient's name (the system will prompt you). Click on the name. Then start typing your message. Simple, right?