hi there . i need help finding a train leaving cambridge on sunday .
user
okay , train tr8131 leaves at 7:17 on sunday and arrives by 8:08 . would you like me to book that for you ?
assistant
yes please book it
user
excellent , how many are travelling ?
assistant
the train should be arriving at london liverpool street and leave after 10:00 . i would like 4 tickets for that specific train . i also need the reference number .