The conversation between human and AI assistant.
Are the UFO sightings real?
I'm not really sure. Have there been any famous cases of UFO sightings?
Yes, there are several famous cases of UFO sightings. One of the most well-known is the Roswell incident in 1947, where a UFO allegedly crashed in New Mexico. Another famous case is the Phoenix Lights sighting in 1997, where thousands of people reported seeing a large V-shaped object in the sky.