A and B are new international students. they are going to the post office on campus to mail letters and parcels to their family back home. Afterwards, they would like to do some shopping. But I have no idea how to get to a shopping mall by public transportation. So, they ask C, the post-office staff, for information. Later, at the shopping mall they meet student D, a new Thai friend. while shopping, they ask him/her how to get to different places in town.