hi ! i am looking for a train to norwich on saturday .
user
what is your departure site and time ?
assistant
from cambridge and i want to arrive by 20:30 .
user
i have a train that would leave at 18:36 and arrive by 19:55 . it s 79 minutes long and costs 14.08 pounds . would you like me to book it ?
assistant
yes please , book it for 7 people .