Waitless SQL Database Table Design

Order:
Order_ID (int)
Dining_Table_ID (int)
Order_Type (string)
Order_Time (datetime)
Completed (int)
Completed_Time (string)


DiningTable:
Dining_Table_ID (int)
Employee_ID (int)
Seats (int)
is_Active (int)
is_Occupied (int)
Seating_time (datetime)
Reservation_Name (string)
Has_Birthday (int)
Special_Request (string)

Employee:
Employee_ID (int)
F_Name (string)
L_Name (string)
Is_Manager (int)
Hire_Date (datetime)
Birth_Date (datetime)
Address (string)
Phone (string)
Token (string)
Salary (decimal)
Title (string)