text: Sam: happy birthday Zoe
  Zoe: thankyouu ^.^  ^.^
  Sam: you're welcome :)
  Zoe: wow i didnt think youd remember
  Sam: why wouldn't i
  Zoe: i dont know
  Sam: how could i forget
  Zoe: ...
target: It's Zoe's birthday. Sam gives her wishes. Zoe didn't expect Sam to remember her birthday.