That day

That moment

They obliged me to write

they asked me to complete this sentence

World could be better if

I wish I was just school boy and I could complete that with small dreams

but unfortunately I remembered you

and I write

In this world for each Hi that you once
tell to a familiar face
one Bye is waiting...

* World could be better if*

vice versa of that  sentence was correct as sure as it is
and it was possible to complete that sentence with

...and for each Bye one Hi is waiting as well.