In a shopping activity, performer who pursues his/her shopping in a grocery store talks many things. His/Her statements referred to not only decision, preference or schedule but also lifestyle, history or habit. Supposing that you have a aged person(he/she may be your ``family'' or ``friend'') and you want to know his/her history, experience, intelligence or etc., we recommend you a conversation method which is based on an observation. In our proposed method, you don't have to design conversation process strictly. Performer will talk to you spontaneously. Accordingly, our method is eqaul to reminiscence because both of them are appropriate to understanding performer through his/her statements. In addition, it will be easier for you to use our method than reminiscence without any special preparation or expert knowledge.