After the second Task, Harry goes to the kitchens to thank Dobby for the Gillyweed. There, he finds Fleur trying to instruct the House Elves how to make Crêpes, but since she's a disaster in the kitchen, it's a case of blind leading the blind. Harry watches the mess for a few minutes, Fleur covered in flour and badly mixed batter, the elves shuffling around embarrassed since the results of their experiments isn't what it's supposed to be.
Harry steps in, familiar with the recipe since it was a favourite of the Dursleys. Fleur is grateful and, with playful arrogance, offers Harry a reward for saving her sister, getting to eat the Crêpes together with her. Harry deadpans that he made the pancakes, so why should it be a reward. Fleur points out that quite a few students would kill for the opportunity and they banter back and forth a bit.
They talk about the second task and Harry reveals that Dobby saved his ass with the Gillyweed. From there on, time flies by as they talk about everything under the sun and get to know each other.