It's far more likely to be due to data derived from lots of enquiries from different people than from an individual. For example, while airlines will probably raise their ticket prices automatically when they know that lots of people will want to travel to a major European football match on a particular date, they might not spot the fact that lots of netball fans will all be looking to travel to a major tournament on, or around, the date of that event. However their computer system will detect an abnormal number of enquiries for flights around then and start putting the fares up.