diff --git a/ProjectAirline/Entities/Enums/PreparatoryWorkStatus.cs b/ProjectAirline/Entities/Enums/PreparatoryWorkStatus.cs
new file mode 100644
index 0000000..90a704b
--- /dev/null
+++ b/ProjectAirline/Entities/Enums/PreparatoryWorkStatus.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectAirline.Entities.Enums;
+
+public enum PreparatoryWorkStatus
+{
+    None = 0,
+
+    Waiting = 1,
+    
+    InProgress = 2,
+
+    Completed = 3,
+
+    Canceled = 4
+}
diff --git a/ProjectAirline/Entities/Enums/TicketStatus.cs b/ProjectAirline/Entities/Enums/TicketStatus.cs
new file mode 100644
index 0000000..1bf7ebc
--- /dev/null
+++ b/ProjectAirline/Entities/Enums/TicketStatus.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectAirline.Entities.Enums;
+
+[Flags]
+public enum TicketStatus
+{
+    None = 0,
+
+    Paid = 1,
+
+    Canceled = 2,
+
+    Refunded = 4
+}
diff --git a/ProjectAirline/Entities/PreparatoryWork.cs b/ProjectAirline/Entities/PreparatoryWork.cs
index 1e9b3a3..c9dae7b 100644
--- a/ProjectAirline/Entities/PreparatoryWork.cs
+++ b/ProjectAirline/Entities/PreparatoryWork.cs
@@ -1,4 +1,5 @@
-using System;
+using ProjectAirline.Entities.Enums;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,5 +9,22 @@ namespace ProjectAirline.Entities;
 
 public class PreparatoryWork
 {
+    public int Id { get; private set; }
 
+    public DateTime StartDate { get; private set; }
+
+    public DateTime EndDate { get; private set; }
+
+    public PreparatoryWorkStatus Status { get; private set; }
+
+    public static PreparatoryWork CreatePrerapatoryWork(int id, DateTime StartDate, DateTime EndDate, PreparatoryWorkStatus Status)
+    {
+        return new PreparatoryWork
+        {
+            Id = id,
+            StartDate = StartDate,
+            EndDate = EndDate,
+            Status = Status
+        };
+    }
 }
diff --git a/ProjectAirline/Entities/Ticket.cs b/ProjectAirline/Entities/Ticket.cs
index 90275ca..dec91ee 100644
--- a/ProjectAirline/Entities/Ticket.cs
+++ b/ProjectAirline/Entities/Ticket.cs
@@ -20,5 +20,4 @@ public class Ticket
             DateBuy = DateTime.Now,
         };
     }
-
 }
diff --git a/ProjectAirline/Repositories/IFlightRepository.cs b/ProjectAirline/Repositories/IFlightRepository.cs
index bbc7ea1..88490e6 100644
--- a/ProjectAirline/Repositories/IFlightRepository.cs
+++ b/ProjectAirline/Repositories/IFlightRepository.cs
@@ -9,13 +9,17 @@ namespace ProjectAirline.Repositories;
 
 public interface IFlightRepository
 {
-    IEnumerable<Flight> ReadFlights();
-
-    Flight ReadFlightById(int id);
+    IEnumerable<Flight> ReadFlights(DateTime? dateFrom = null, DateTime? dateTo = null, int? flightId = null);
 
     void CreateFlight(Flight flight);
+    
+    //IEnumerable<Flight> ReadFlights();
 
-    void UpdateFlight(Flight flight);
+    //Flight ReadFlightById(int id);
 
-    void DeleteFlight(int id);
+    //void CreateFlight(Flight flight);
+
+    //void UpdateFlight(Flight flight);
+
+    //void DeleteFlight(int id);
 }
diff --git a/ProjectAirline/Repositories/IPreparatoryWorkRepository.cs b/ProjectAirline/Repositories/IPreparatoryWorkRepository.cs
index 97b0113..4f6fa00 100644
--- a/ProjectAirline/Repositories/IPreparatoryWorkRepository.cs
+++ b/ProjectAirline/Repositories/IPreparatoryWorkRepository.cs
@@ -1,4 +1,5 @@
-using System;
+using ProjectAirline.Entities;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,4 +9,10 @@ namespace ProjectAirline.Repositories;
 
 public interface IPreparatoryWorkRepository
 {
+    IEnumerable<PreparatoryWork> ReadPreparatoryWork(DateTime? dateFrom = null, DateTime? dateTo = null, int? preparatoryWorkId = null,
+        PreparatoryWork? preparatoryWorkStatus = null);
+
+    void CreatePreparatoryWork(PreparatoryWork preparatoryWork);
+
+    void DeletePreparatoryWork(int id);
 }
diff --git a/ProjectAirline/Repositories/Implementations/FlightRepository.cs b/ProjectAirline/Repositories/Implementations/FlightRepository.cs
index 6e65879..0660a0b 100644
--- a/ProjectAirline/Repositories/Implementations/FlightRepository.cs
+++ b/ProjectAirline/Repositories/Implementations/FlightRepository.cs
@@ -13,21 +13,27 @@ public class FlightRepository : IFlightRepository
     {
     }
 
-    public void DeleteFlight(int id)
-    {
-    }
-
-    public Flight ReadFlightById(int id)
-    {
-        return Flight.CreateFlight(0, DateTime.Now, DateTime.Now, string.Empty, 0);
-    }
-
-    public IEnumerable<Flight> ReadFlights()
+    public IEnumerable<Flight> ReadFlights(DateTime? dateFrom = null, DateTime? dateTo = null, int? flightId = null)
     {
         return [];
     }
 
-    public void UpdateFlight(Flight flight)
-    {
-    }
+
+    //public void DeleteFlight(int id)
+    //{
+    //}
+
+    //public Flight ReadFlightById(int id)
+    //{
+    //    return Flight.CreateFlight(0, DateTime.Now, DateTime.Now, string.Empty, 0);
+    //}
+
+    //public IEnumerable<Flight> ReadFlights()
+    //{
+    //    return [];
+    //}
+
+    //public void UpdateFlight(Flight flight)
+    //{
+    //}
 }
diff --git a/ProjectAirline/Repositories/Implementations/PreparatoryWorkRepository.cs b/ProjectAirline/Repositories/Implementations/PreparatoryWorkRepository.cs
index 33926eb..6914af7 100644
--- a/ProjectAirline/Repositories/Implementations/PreparatoryWorkRepository.cs
+++ b/ProjectAirline/Repositories/Implementations/PreparatoryWorkRepository.cs
@@ -1,4 +1,5 @@
-using System;
+using ProjectAirline.Entities;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,5 +9,16 @@ namespace ProjectAirline.Repositories.Implementations;
 
 public class PreparatoryWorkRepository : IPreparatoryWorkRepository
 {
+    public void CreatePreparatoryWork(PreparatoryWork preparatoryWork)
+    {
+    }
 
+    public void DeletePreparatoryWork(int id)
+    {
+    }
+
+    public IEnumerable<PreparatoryWork> ReadPreparatoryWork(DateTime? dateFrom = null, DateTime? dateTo = null, int? preparatoryWorkId = null, PreparatoryWork? preparatoryWorkStatus = null)
+    {
+        return [];
+    }
 }