Sleep thru the night

Hi. My baby pass 7mo but haven’t STTN. from 11pm to 1am, then 130 to 5, then till around 7-9am. Every wake up he looking for a milk. No milk he will cry and harder to put back to sleep. How to train LO? And is it normal? Thanks #STTN #pleasehelp #firsttimemom #firstbaby #FTM #sleep