I would like to share a story that I have been told by my mom many times.
In Turkey, there are customs in order to connect with ghosts or genies. There are as well professional people who practice sessions. My mom and her friends somehow found out how to summon a ghost. They were teenagers back then and they wanted to do it for fun. It was done with the same old style, letters on papers and a coffee cup turned upside down. She says, cup started moving by itself as they asked questions.
My mom asked the ghost who will she marry. It has given a name and nobody actually cared about the name they just laughed along. The funny thing is, my mom got married to my father whose name is the exact same name. - Can be coincidence but it effected her. So she told this story to my grandmother. After some time a friend of my grandmothers came to our house for seeking help. She heard the summoning story and she asked my mom if they can summon because their daughter is lost for over a year and she is no where to be found. They were wondering if the ghost would help them to know if the girl is alive or dead.
My mom accepted to help them. When they asked the ghost, they recieved an answer that says, girl is alive and she escaped from the house to get married to a guy. She lives in a small villiage, is married with kids. They did not believe this story and they were like; "she was too young to see any guy and she was always home, looking after the younger siblings". And ghost replied; this is exactly why she decided to leave the house. This time they got angry and they didn't believe. Not long after that, girl was found in a village and she was married like the ghost said. My mom never did ghost summoning after that (Yes, I asked her because I was curious). But some people say, if they have good intentions they do come to aid. Someone who does this job professionally once said, they summoned the father of a family because he was lost as well. He told them that he was murdered and he explained where to find the body. They actually found the body. Another story was shared by our neighbor, they once tried to summon a ghost and ask questions. But instead of answering, ghost was keep writing poems for them, praising their hair color or eyes.