Can you find me a train going to london liverpool street arriving by 21:45?
I sure can.  What day were you hoping to travel?
The train should leave on Friday.
There is a train leaving at 5:59 on Friday.
How long will the trip take?
The trip will take around 88 minutes. What else would you like to know? 
When I get to Cambridge, I'd like to see some attractions in the centre of town. What is there to see and do?
We have 44 attractions. What type of attraction would you like?
I don't have a preference can you suggest something?
I would like to recommend holy trinity church as it is beautiful architecture.
What is their phone number?
The phone number is 01223355397.  Would you also like their address?
No just the postcode and entrance fee, if available. 
Admission is free and their postcode is cb23nz. What else can I help you with?
that is all i needed for today. thanks for helping
thanks for using our services. good day