hello , i need to book a roundtrip train ticket that will be going to cambridge and then leaving on friday .
user
okay , i have found over 2,000 trains going to cambridge . to help narrow the selection , when do you want to depart and arrive ?
assistant
i would like to leave norwich on friday and arrive by 12:30 .
user
there are 6 trains . the closest arrival is tr4045 , which leaves at 10:16 and arrives at 11:35 . would you like me to book this train for you ?
assistant
no , but can you tell me the total travel time for that train ?