I'd like a train to Ely that leaves Wednesday. Easy enough. Where is your departure point? Cambridge. I would like to leave after 15:30 if possible. TR6745 departs cambridge at 15:50 Wednesday, arriving at Ely at 16:07. Will that one work for you? It's only 4.40 GBP to ride. Great can I book that for 8 people and get a reference number please? You are booked for 8 seats on TR6745 leaving Cambridge Wednesday at 17:50. Reference # is OCWICAXZ and you can pay at the station. 4.40 pounds each.