Hi Nicole :)
'Delemoonam' is a contracted form for 'delemoon ham', meaning we have also missed you!
'Laamassabo' is contracted form of 'laamassab ro'.. I guess you know 'ro' is the object marker in Persian.. So laamassab means like damned or bloody, etc. (It isn't necessarily considered as vulgar, it's just quite colloquial..)
Hope it helps.. ;)