i need a friday train , to arrive by 19:30 .
user
there are many trains ! where are you coming from ?
assistant
i am heading to broxbourne from cambridge .
user
is there a certain time you would like to leave ?
assistant
no , i just know that i need to arrive by 19:30 .
user
tr2436 will arrive in broxbourne at 19:01 . would you like me to book a ticket for you ?
assistant
yes please for 4 people