Respected Brother/Sister in Islam
As Salaamu Alaykum wa Rahmatullahi Wa Barakaatuh
Haamidaw wa Musalliyaa
Your query below refers;
In cases of necessity one is permitted to speak to a strange female. Hence, when proposing to a lady, one is permitted to speak to the lady within reason whilst maintaining shame, modesty and dignity and ensuring that one is not in total seclusion with the girl.
And Allah Ta'ala Knows Best
Shafiq Jakhura (Mufti)