From the cases the problem can be diagnosed that Maria is a fan of Charles, and Charles has invited him to play holidays inski , where Maria has answered OK and Charles was willing to fund the total cost £ 2500 from those cases to see whether that Charles invited Maria to skiing is just a proposal and that it agree with Maria as a response, it can be considered to have been presented and the response to it. The contract occurs. Even after Maria will reject to skiing holidays with Charles