I understand that for some on mobile, it's a bit difficult to find our contact details. For inquiries, please email firstname.lastname@example.org. Please include your names, date, time, and venue. You should get a response within 24 hours.
The inclusion of details helps suppliers in general to determine availability before sending their rates. It doesn't help you as a client to inquire without details because you will compare the suppliers rates, then end up frustrated because when you're finally ready to reveal your date, the supplier isn't free. Waste of time, right? Or when you're finally ready to reveal your venue, there's an additional out of town fee. Avoid frustration, send the full details right away when inquiring :)