Direct Booking: Guests contact list

It would be very helpful if it could create an address book or a list of all the direct booking guests, with their name, address, email, etc. You gather all this information when they direct book, but most of my customers email me directly and I have to enter their name, email and phone number in each time when I book them directly. It would be nice for it to save this information so next time the guest returns, we have all that information and I could just select them from the list. It would also come in handy for emailing special promotions, or sending out thank you cards, Christmas cards, etc. Seems like a simple request since the data is already gathered. Thank you.