What are the two speakers talking about?

M: Hi, Jane. Where are you going this summer holiday?
W: Nowhere. I’ m staying at home to help my mother in the shop. What are you going to do for the holidays,Tom?
M: I’ m not sure, yet. But I’ m thinking of going to the beach with my brothers.
W: That’ 11 be nice. How long are you going to stay there?
M: Couple of days, I guess. Say, would you like to come along with us? We can go swimming in the sea.
W: Thanks, but maybe next time. My mother really needs some help in the shop. Besides,I don’t want to miss my piano lessons. So have fun, and I’ 11 see you in September.
M: Well, see you then. Enjoy your holidays.