The em7 has the 3rd fret of the high E string as does the G, please remember this else 
it won't sound right!

 B5         A5  D5  E5
One moment to another
   G5       A5    A5  B5
A world to be discovered
 B5          A5  D5       E5
And now it's my turn to fly
E5              G5       E5 A5
Let this be the last time I say goodbye

Then the rest of the song goes the same, when he sings 'Say goodbye' with the A hammer 
on to the 4th fret with the B string.