This is how most business e-mails in English start out: with a simple greeting ("Hi", "Good morning", "Hello") and the recipient's first name:

Hi Lana,
Can you send me the proposal we discussed yesterday?

Thanks,
Liz

Depending on your culture, this might seem too casual for business e-mail, but this is the most appropriate style for writing to someone within your own company. It even works for writing to people outside of your company if you know them or if your e-mail is just about something simple.