I'd like details about trains leaving from Cambridge and going to Ely. 
There are 70 scheduled trains on that route. Do you have a day or time you wish to travel?
I'll be traveling on Monday and I would like to leave after 15:00.
What time do you need to arrive by? 
It doesn't matter, just so it leaves after 15:00.  I'll just need the train id and arrival time please. 
the TR7177 leaves at 15:50, do you want tickets?
No thank you. I would like to know the arrival time, though.
The arrival time is 16:07.
Thanks. Can you also find a museum ?
Is there a certain area of town you would like to be in?
No, whatever your recommendation is. I will just need the area it's in and the entrance fee please. 
people's portraits exhibition at girton college in the west is very interest, the entrance fee is free.  Do you need more info?
No thanks. That gives me all I need. Take care. Goodbye. 
Thank you for allowing me to assist you today.