options: f : ok. sir , i will change these pounds for rmb . but you have to wait for a while in this bank . f : ok. sir , i will change these pounds for dollars . please wait for a while in this bank . f : okay . since you do n't need help , you can stay in this classroom for a while . f : really ? you just want large ones ? sorry , sir . in this supermarket , we do n't have large ones .
article: f : good morning . may i help you , sir ? m : yes . could i change these pounds for dollars , please ? f : do you want small bills or large ones ? m : both are ok .