i need a train that leaves cambridge on thursday .
user
there are 202 trains leaving cambridge on thursday . would you like to narrow your search by destination and time ?
assistant
i am going to the stansted airport and i need to arrive by 21:30 .
user
when are you leaving ?
assistant
departure time does not matter , i just need to arrive at the stansted airport by 21:30 on thursday , and i need to depart from cambridge .