train这是游客和旅行社工作人员之间的对话，文中两次提到坐火车，因此可认定他们的交通工具是火车。

W: Mm, as a matter of fact, I appreciate your help very much. But, I don’t think it desirable. Mm... Do you have other suggestions? I suppose...
M: What did you have in mind? Alternatively, now just a moment, there’s another three-day trip going by train. That’s a tiny bit more expensive ....
W: Yeah... how much is that one?
M: That’s $100.
W: I think I’d prefer to go by train.
M: Right, now...
W: What about the accommodation that goes with that trip?
M: Well, that is inclusive. It means it’s a three-star hotel, which is pretty good quality right in the center of town. It is what we call bed and breakfast though. Would that be all right?
W: Oh, that would suit me fine, because I’d like to try some of that Scottish food.
M: Of course, so when would you like to go because this trip, the train, three days, it’s midweek only ... that would be Tuesday , Wednesday, Thursday ... would that suit you?
W: Wonderful!
M: All right.