What are the advantages and disadvantages of rail travel?
What are the advantages and disadvantages of rail travel?
user
The advantages are that it's safe and enjoyable.  The disadvantages are that it's slow and requires a lot of money.
assistant
I don't think it requires a lot of money.
user
Well, you have to pay for a ticket for each leg of the trip, and maybe other expenses like food or whatever.
assistant
oh, that is true.
user