While at her own mother's funeral, a woman meets a guy she doesn't know. she thinks this guy is amazing — her dream man — and is pretty sure he could be the love of her life. however, she never asked for his name or number and afterwards could not find anyone who knows who he was. so how did she find the man

To find the man whom she knows nothing about, she kills her sister in expectation of his presence in the funeral.

Explanation:

This is a type of riddle that comes under psychological study. Questions like these are formed to understand the physic and mental thoughts of a person. To find the man, she kills her sister believing he would come for her sister's funeral too. In fact, an alternative solution is hard to find. She has to either stalk him or go through her mother's friends and connections. Otherwise, something like killing her sister.