could you help me choose a train running from stansted airport to cambridge ?
user
certainly . which day would you like to travel ?
assistant
i need to leave on sunday after 21:15 please .
user
there is a train leaving at 22:24 from stansted airport on sunday . would you like me to book it ?
assistant
yes , that would be great .
user
how many tickets do you need ?
assistant
actually just tell me how long the trip is
user
the duration is 28 minutes . may i help with something else ?
assistant
i also need a place to stay in the moderate price range .
user
do you want a hotel or a guesthouse ?
assistant
i would like a 3 star hotel in the moderate price range , please .