I've heard that the only trains out of Cambridge leave before 8:00. That's not really true, is it?
No, it certainly isn't.
Is there a train that departs from cambridge after 08:00 on Wednesday that goes to birmingham new street?
There is.  There is actually an 08:01 but that might be too close.  How about a 09:01? 
The 08:01 is fine actually. Can you book it for 6 people?
Sure thing, the reference number is D6UJRBDF
Thank you. I also need information about finches bed and breakfast.
Finches bed and breakfast a guesthousein the west area.it is cheap and in the 4 star range.their number is 01223276653	and cb30nd. it is located in 144 thornton road.