on-line / off-line database tables

Does anyone have any experience of importing an on-line database into an off-line one?

I need to develop an event booking database. The off-line version will be taking all client bookings as well as the general administration of the event such as who has paid etc. The off-line database will be used when people send in paper booking forms or via the telephone.

I was going to build an on-line form that writes into tables on an Access 2000 DB using ASP. The administrator will then need to download the database every few days and merge it in with the main database. Can this be done?

Also, any tips for handling the situation where someone revisits the site and needs to amend their booking.

I was having the same problem, even worst as it wasn't only one operator, but about 40, spreaded in about 20 different cities. Should they all have internet access smoothly, it  wouldn't be a problem, but they have only limited access. So, what I did was to use the online db as the main database (as suggested by dypers), and the each operator database as individual database. I have  created a form in access that creates a text file after each raport is filled. When they got connected, just upload those text files and with a script I read them and insert them in the main db. With a proper deadline setting, I know at any time the exact situation of the main db.