You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Awesome, you have a wonderful day! Sentence2: I have two 0 star guesthouses with free parking. One is in the north and the other is in the centre. Should I book one of them for you? Sentence3: You are booked on TR8078. Your reference number is Y3T1L5E6 . The price is 10.10 pounds. May I help you with anything else? Sentence4: Your booking is confirmed at El Shaddai. Your reference number is J7BTDTOL . Can I help with anything else? Sentence5: I don't care about the location. Either one will work. Just book it for 1 for 5 nights starting on Sunday. Sentence6: Well we have quite a few guesthouses. Anything in particular your interested in? Cheap, moderate or expensive? Sentence7: Yes please, I am also looking for a train to depart on Friday from Cambridge at 10:15 to Bishops Stortford. Sentence8: There are two guesthouses in the cheap price range that offer free parking and free wi-fi. One is in the north and one in the centre of town. Sentence9: I would like it to include free parking as well, with a star of 0. Sentence10: Hi, I'm looking for a place to stay that has free parking. Sentence11: Actually, I need it to have free parking and free wifi. Do you have any hotels with these amenities? Sentence12: The earliest train after 10:15 leaves at 11:29. Will that work for you? Sentence13: Please book 1 seat for friday on the 11:29 train going to bishops sortford. Thanks! Sentence14: No. Thank you. That's all for today. Sentence15: Yes, but can I have the price first? Sentence16: It's 10.10 pounds, would you like a booking? Question: Who has spoken the sentence 11? (A) User (B) System
A:
Answer: (B) System