Stations StationID, StationName, Location
Trains TrainID, TrainName, TrainType, Capacity
Services ServiceID, TrainID, DepartureStationID, ArrivalStationID, DepartureTime, ArrivalTime, FrequencyPerDay
Customers CustomerID, FirstName, LastName, Email, PaymentType
Tickets TicketID, ServiceID, CustomerID, TicketLevel, Cost, CurrencyCode