This is not permissible at all and you must not have any communication with this woman as she is a total stranger to you. These are one of the traps of Satan and you must not let him play with you like this! If you can marry her, go ahead but if not, then stop all communications even if this means she would die.

Kindly refer to the following link(s):
https://www.youtube.com/watch?v=_8qy3inai74

A man used to talk to a woman but he broke up for Allah’s sake nd doesn’t wanna go back to dis sin.That woman is a TB patient nd doctors said dey don’t know what’s gonna happen next.She used to be very happy talking to dis man.She’s broken now nd dis man wants to talk to her so that she might feel better. If she cries, chest pain nd cough starts nd she wud suffer even more after breakup