i would like to find a train going to cambridge that leaves on sunday .
user
ok , and where are you departing from ?
assistant
i would be leaving from peterborough . i need to arrive in cambridge by 19:30 though .
user
okay , there are a few trains available . what time would you like to depart ?
assistant
my departure time is flexible .
user
the earliest train is tr3782 which leaves at 05:19 , would you like me to book some tickets for you ?
assistant
no , that will not be necessary . i would like to get the price , though .