Excel 97

I use a database to record bookings, that is a list of individuals' names
and dates for which we have booked them, often up to about 12 months into the
future, (along with several other columns of details.)

In a seperate file I also have a calendar in which I show these individuals'
bookings, simply by inserting "B" in the appropriate column, against that
individual's name.

The dates are column headers running across the top of the sheet and the
names run down the side to identify the rows.

I want to write a macro to automatically insert a "B" inthe correct cell for
each booking we have made.

I should be grateful for any help with this task.

Many thanks

Bob