answer: #Person2#'s doctor told #Person2# to drink less coffee, so #Person1# recommends watermelon juice.
documents: #Person1#: Would you like to drink some coffee?
  #Person2#: No, thanks. I have some trouble with my heart, my doctor recommend I to drink less.
  #Person1#: Would you like to try some watermelon juice? It tastes good.
  #Person2#: All right