Please find a train that departs from Peterborough and arrives in Cambridge by 8:45. Okay, and which day would you like to travel? I would like to leave on Saturday from london liverpool street The TR3390 arrives Saturday at 8:38. Would you like me to book it for you? Can I get travel time and price first, please? The trip is 50 minutes long and it is 13.20 pounds for a ticket. Ok thanks, Im ready to book. Great, I have booked your ticket, your reference number is : 9LLWMNOM . May I help with anything further. I'm so sorry. I didn't mean to book yet. I won't need that reservation. Could you make sure that train TR3390 is departing from London Liverpool? Train TR3390 is departing from peterborough to cambridge. Would you like me to look for a train departing from London Liverpool? Yes, please. I need to know the price and travel time for that as well. TR7397 leaves from London Liverpool Street on Saturday at 05:39 and arrives in Cambridge at 07:07 with travel time of 88 minutes. Cost is 13.28 pounds. Shall I book this ticket?