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If I say more would be tooo easy... sorry :)

just one teeny tiny hint, pleaseeeee , like... is it a common phrase? do people say it often ? would you say it more in one country than in another?

It is very common and people say it everywhere in the world if they can speak english ;)

the first line will make its own phrase and the second one other, no common letter between them?

I can not answer that, it is one of the thing who make this puzzle a puzzle ;)

ok now my sleep has been lost. While I am solving it , please have a look at my posts and support me.

hahahaha Ok I will :D