async void Handle_Clicked(object sender, System.EventArgs e)
{
if (Validates.validateSearch(fromCity, toCity))
{
await Navigation.PushAsync(new ShowFlightsPage(this.repositoryList, toCity, fromCity, datePicker.Date));
}
else
{
await App.Current.MainPage.DisplayAlert("Alert", "Fill all fields", "OK");
}
}
