Straightforward, unhurried, and explained as it goes.
Any dental insurance details, a list of medications you take, and the name of your previous dentist if there are records to transfer.
A first appointment runs longer than a routine one because it includes a full examination. Ask when you call so you can plan your day.
That is a common reason people book, not a reason to keep waiting. The first visit establishes where things stand and in what order to deal with them.