i need to find a train that departs from cambridge and arrives by 9:15 . can you help ?
user
what is your destination ?
assistant
i am traveling to ely .
user
we can definitely help you with that , i just need to know the day you will be traveling .
assistant
for today , arriving by 21:15 .
user
i am sorry , i need to know the day you will be traveling .
assistant
i am departing on sunday .