Can I help you , madam ?   Yes . I'd like to choose a sweater for my son .   I see . Do you have any ideas so far ?   Not yet . Can you give me some suggestions ?   Sure , madam . But may l know how old he is ?   Thirteen .   And the height ?   About 158cm . He likes to wear loose-fitting sweaters .   I see . How about this one ? It's very fashionable and popular among teenagers . 