hello , i am looking for a train out of cambridge .
user
what day would you be traveling and where would you like to go ?
assistant
i would be leaving on friday and i would be traveling to london liverpool street and i would like to leave after 21:15
user
you could take the tr9557 at 21:59 , or the tr3138 2 hour -s later .
assistant
i'll take the earlier train . could you tell me the travel time , and at what time i will be arriving at london liverpool street ?
user
sure , the travel time is 88 minutes and you will arrive at 23:27 . would you like me to book the train for you ?
assistant
that would be great , thanks . i am also looking for a hotel . i would prefer a 3 star hotel . i do not need parking .