First, draw the dolman sleeve on the back raising 1,5cm at the neckline and 2,5cm at the shoulder tip.
Redraw the side seam and center back discarding the dart volume.
Then move to the front, draw the V neckline and the underbust cut.
Discard the dart from the side seam.
Draw a slash line from bust point to the armpit and cut through it.
You should close the underbust dart and open it there.