帮我看一道听力题!听力原文是这样的：W：New City Railway StationM:Good evening.C

帮我看一道听力题!
听力原文是这样的：
W：New City Railway Station
M:Good evening.Could you tell me the time of the last train to London,please?
W:Last train to London?Yes,Sir,8:35,change at Goldberg.
Where is the man going?
A.London B.Goldberg
我想知道这段对话到底是怎样一个场景啊?什么叫“the last train to London”,他既然要去伦敦为什么要问上一班去伦敦的车的时间?最后那个“change at Goldberg”又是什么意思?