The flight attendant told me the plane was fully booked on the next trip, it was replacing one that had to be taken in for maintenance at my destination or some

The flight attendant told me the plane was fully booked on the next trip, it was replacing one that had to be taken in for maintenance at my destination or something along those lines (Its been a while, I don't remember the details), so it was either flying it empty or flying with us on it.