Dm7 Am7 Bbmaj7
Dm7 Am7 Bbmaj7 Am7 G\Bb

Chord details:

Dm7
===
x
1 (then hammer on 3)
0
2
0
x

Am7
===
x (or 3)
3
0
0
2
2

Bbmaj7
===
0
x
2 (then hammer from open)
2 (then hammer from open)
3
3

Bbmaj7 (second part)
===
5 (bar with pinky)
5 (bar with pinky)
2 (bar with index finger)
2 (bar with index finger)
x
3 (hold with middle finger)

G\Bb
===
x
1
x
3 (then hammer on 5)
0 (then 3)
0