Fleur was jittery. The dream had knocked her completely off balance, and she had never been so glad her class was over. She was charming teacups clean, and trying to stack them in their places, but it wasn't really working. She jumped and dropped a cup when the knock came, and called out, "Come in!"
It should be Ginny, but it didn't make her any less nervous. She had to ask someone about whether her dream was right, and she had never met Ron in person, and was too terrified of scaring off Bill to ask him. She smoothed her hair, and tried to look less frazzled, anyway.