Añadir 'reservas/urls.py'

reservas/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('create/', views.create_event, name='create_event'),
+    path('<int:event_id>/book/', views.book_event, name='book_event'),
+]