You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Booking has been completed! Your reference# is D6V5M769 . The total is 79.67 GBP, payable at the station. Can I help you with anything else? Sentence2: Is there a reference number for the hotel? I also need a train to london liverpool street. Can you help with that too? Sentence3: Yes please, for 6 people. Sentence4: I'm planning a trip with an Arthurian theme. I've heard there's a hotel called Avalon there in Cambridge. Is that right? Sentence5: Actually, can you book 6 people for 3 nights starting on wednesday? Sentence6: Your Reference number is : EHNOQL7E . I can help with the train as well. Can you give me a little more information on your trip? Sentence7: You are welcome. Have a nice time in Cambridge. Bye. Sentence8: You're all booked. Sentence9: Yes there is a guesthouse called avalon. Would you like any more information on that? Sentence10: That's all I need for today. Thanks! Sentence11: I need to get to liverpool st on saturday, but I can't leave cambridge until after 13:45 Sentence12: TR4466 leaves at 13:59 and arrives at 15:27. Would you like me to book it? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System