To finish your e-mail you need to add a sign-off and your name.
Sign-off examples you can use:
Yours sincerely, (you know the name of the person you are writing to)
Yours faithfully, (you don't know the name of the person you are writing to)
Do NOT forget to use a comma at the end of your sign-off!
Now add your name and you are done!
Example
Yours sincerely,
Anna Hatheway