CREATE TABLE table_18071 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( million ) " TEXT)

what is the original air date for the episoe written by vanessa reisen?
SELECT "Original air date" FROM table_18071 WHERE "Written by" = 'Vanessa Reisen'
SELECT "Original air date" FROM "table_18071" WHERE "Written by" = 'Vanessa Reisen'