My two cents (For whatever it’s worth…)
You point out a straight offer of a wanted BFE, then tell him you want a [dominant] top and wrap up with asking for a price estimate. Not a provider here, just another paying client; but, I wouldn’t know how to respond either.
Perhaps being more concise about what you expect out of three days. Nights out doing what? The entire weekend fucking? Out of town trip? Daytime excursions? Does he get some off time within 72-hours?
He know zero about you. If you’re in town, our of town, a description of what you look like. If he’s a young escort starting out he may not know to ask these thing so you need to take the lead. I think it is much easier to ask for longer periods of time with someone you’ve met and been with rather than ask this of someone new and new to the profession.