i want a train going to london kings cross .
user
we have 70 trains that meet that criteria , what is your point of departure please ?
assistant
i am departing from cambridge .
user
great ! what day would you like to leave ? do you have any preferred times to leave and arrive by ?
assistant
i would like to travel on monday and leave after 15:30 .
user
there are 4 trains that depart every 2 hour -s . the earliest leaves at 17:70 and the last 1 leaves at 23:00 . what s your preference ?
assistant
please book the 17:70 for 3 people .
user
actually , the earliest train , tr7786 leaves cambridge at 17:00 and arrives at 17:51 . should i go ahead a book this for 3 people ?
assistant
yes please it needs to be for 3 people .