Hello . I bought a China dress in your shop this morning .   Yes ?   I bought it one size up by mistake .   Oh , did you ?   I wonder if you can change it to one size down .   Yes , of course.Will you come with the receipt ?   Then I'll come to your place later in the evening , and how late is your shop open ?   Until 8 o'clock , ma'am . We are looking forward to seeing you . 