Where's Daddy....

Awhile back Daddy was down stairs while the girls were playing upstairs.  Abigail went looking for him.  She went to the top of the stairs and called down "Are you down there Daddy?".  Daddy answered, "No."  She called again, "Daddy, are you down there?"  Daddy answered, "No, Daddy's not down here."  She thought for a minute and  then asked again, "Daddy, are you down there?".  Once again Daddy said, "No, Daddy's not down here."  She turned to her sisters and said, in all seriousness, Daddy's not down there.  Daddy came to the bottom of the stairs laughing.  Now it is a joke with Abby to ask if Daddy or Mommy are down there.