ASKING A TRAVELL INFORMATION

Clara: hello, a return ticket to Exter, please
Amadeu: Ok, but you neet to change at Oxford street
Clara: that's fine. How long does the journey take?
Amadeu: about three and half hours
Clara: how match is a return ticket?
Amadeu: it depends, how old are you?
Clara: I'm fourteen
Amadeu: well, you need a child's ticket, then that's 24.50$
Clara: thanks !!!