These are tabs to the acoustic version of "Assassin" John Mayer performed in 
a seminar at Berklee College of Music. I've added the lyrics from the album version for reference.

http://www.youtube.com/watch?v=bp9w7q04hvs



Gsus2/B  Gsus2 (3x0233@1)Bm(add9)  Aadd9 (x02420@1)Gadd9 (135211@3)  C9 (x3233x@1)    C7b9       Ge---x--------x--------x--------x--------x--------x--------x--------x (320003@1)b---x--------x--------x--------x--------x--------3--------2--------x
g---7--------x--------7--------6--------4--------3--------3--------4
d---7--------7--------11-------9--------7--------2--------2--------5
a---10-------5--------9--------7------- 5--------3--------3--------5
E---7--------3--------7--------5--------3--------x--------x--------3

VERSE:

Gsus2/B
I work in the dead of night
       
          Gsus2When (3x0233@1)the roads are quiet

Bm(add9)
No one is around

A (add9)
To track my moves



Gsus2/B
Racing the yellow lights

Gsus2
To find the gate is open

Bm(add9)
Shes waiting in the room

Aadd9
i just step on through.



PRE-CHORUS:

Gsus4/B                    Bm(add9) Aadd9 (x02420@1)       O whoa whoa whoa whoa...  O whoa whoa whoa whoa

Gsus4/B         Bm(add9)        Aadd9 (x02420@1)           Gsus4/B
        You get in, You get done, and then you get gone

Bm(add9)         Aadd9 (x02420@1)              Gsus4/B
        You never leave a trace or show your face you get gone

Bm(add9)          Aadd9 (x02420@1)         Gadd9 (135211@3)       You should have turned around and left before the sun came up again

Aadd9
        But the sun came up again



CHORUS:

Bm(add9)    Gsus2/B       Gsus2 (3x0233@1)        C9/C7b9
I was a killer, was the best they'd ever seen

Bm(add9)    Gsus2/B       Gsus2 (3x0233@1)        C9/C7b9
I'd steel your heart before you ever heard a thing

Bm(add9)    Gsus2/B       Gsus2     C9/C7b9
I'm an assassin and I had a job to do

Bm(add9)    Gsus2/B       Gsus2 (3x0233@1)           C9 (x3233x@1)    G (320003@1)   C9/C7b9
Little did I know that girl was an assassin too...