Added airlines and destination_cities json files

RegressionModel.py

@@ -14,5 +14,5 @@ model_years = list(i for i in range(2018, 2023))
 selected_day = list(range(366))
 delay = list(delaytime)
 # Shared Data from GUI
-GUI_selections = {"date": "", "airline": "", "destination": "", "years to model": ""}
-
+# GUI_selections = {"date": "", "airline": "", "destination": "", "years to model": ""}
+GUI_selections = {"date": "", "destination": "", "years to model": ""}