can you help me get to cambridge by 8:30 on friday ?
user
i have located several trains that will arrive friday by 8:30 . to help narrow your search , where would you like to depart from ?
assistant
i would like to depart from norwich .
user
i have 2 trains arriving by 8:30 in cambridge on friday , 1 arrives by 6:35 , the other by 7:35 . would you like to book a seat for 1 of these ?
assistant
what is the departure time for the train that arrives at 7:35 , and how much do the tickets cost for that 1 ?