Excuse me , I have something to trouble you .   Yes ? I'll be very glad if I could be of any help to you .   An hour ago , I bought this vase with my tourist .   Oh , yes . I remember it clearly . Is there anything wrong with it ?   I'm afraid so . We found this crack on the bottom when I went back to my hotel .   Oh , how awful ! Let me have a look , I'm terribly sorry . It was most thoughtless of me . Would you excuse me , please ?   Oh , It's quite all right , I suppose . It can't be helped sometimes .   It's very kind of you to say so . How about changing another one for you ?   All right . Thank you .   Just a minute , please . I won't be long . I'm sure this one is perfect . You may examine it carefully .   Oh , yes , it is . I'll take this one .   I'm very sorry for any inconvenience I've caused you .   Well , there's no reason to apologize for such a trifle thing . 