You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: The Warkworth House is a guesthouse in the East, it's moderately priced and rated 4 stars. I would love to assist you in booking a room if you would like? Sentence2: There are 5 parks in town. Did you have a certain area you prefer? Sentence3: It's actually not a museum, but considered an architecture attraction. Were you interested in a specific type of attraction? Sentence4: Cambridge university botanic gardens is a beautiful park. Its located at bateman street, costs 4 pounds to get in. Phone 01223336265, cb21jf. Will you need transportation? A train, taxi or bus? Sentence5: have a good day Sentence6: No, Is that a museum or a church. Sentence7: Oh, I suggest my favorite! It's Holy Trinity Church, beautiful architecture, and it's located on Market Street. It's free. Would you like their phone number? Sentence8: I have you at the Warkworth house. Would you like to change the reservations? Sentence9: i am looking for somewhere to go in the centre of Cambridge Sentence10: I think we would like it to be in the centre of town please. Sentence11: Yes your reference number is 53LJQ4H6 . Sentence12: No. That's perfect! Thanks for your help. Good bye. Sentence13: Yes, please. Can you reserve a room for Monday for 5 people, 3 nights? Sentence14: no. also find me a hotel by the name warkworth house Sentence15: Actually, I will need to book lodgings as well. Sentence16: Thanks! Can you suggest to me something to visit that isn't a church or architecture? Maybe a museum or a park? Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: I'd like to find a 4 star guesthouse, please. Sentence2: The Place is a great nightclub in the south, located at 22 sidney street, post code cb23hg. The phone number is 01223324600. Is there anything else I can help you with? Sentence3: Yes, book it for me please. Thank you. Sentence4: It does not really matter. It will be just me starting on Friday for 3 nights. Sentence5: What attractions do you have in the south? Sentence6: I have found 18 guesthomes that match the criteria you listed. Is there any other specifications you have about the guesthouse (area,price range,etc) that you would like to tell me? Sentence7: Unfortunately, the booking was unsuccessful. Would you like to shorten your stay or try another place to stay? Sentence8: arbury lodge guesthouse is a moderately priced guesthouse in the north. How does that sound? Sentence9: The arbury lodge guesthouse is in the moderate price range. Sentence10: We have 8 types of attractions in the south? What type are you looking for? Sentence11: Sure, is there an area you prefer? Sentence12: I have to have free wifi Sentence13: I would like a room that is close to the nightclub for atleast 1 night up to 3 nights? Sentence14: Hmm, I'm not really sure. Do you happen to have any nightclubs? If not, what are my choices? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: book for 1 person and get me reference number Sentence2: Okay. The TR0094 meets your criteria. Would you like more information or would you like to book tickets? Sentence3: Yes, the west please. Sentence4: no thanks that is enough for today Sentence5: we have quite a few in the west, how can I help you? Sentence6: I am looking for a train leaving after 16:15 on friday. Sentence7: We have five museums in the west area. I would recommend the Lynne Strover Gallery. Would you like information on some of the other museums? Sentence8: The train should depart from cambridge and arrive at leicester. Sentence9: Where will you be traveling from and to? Sentence10: The lynne strover gallery is located at 23 high street, fen ditton, postcode cb30aq, and is free. May I help you with something else? Sentence11: Yes please. I'm looking for a good museum in town. Can you suggest one that you like? Sentence12: Okay, your ticket is booked! Reference number UYWWVHK8 . Can I be of any further help? Sentence13: You're welcome! Bye! Sentence14: Are you looking for one in a particular area? Sentence15: Can you give me the postcode, entrance fee, and address of one? Sentence16: Can you please provide me a list of museum options? Question: Who has spoken the sentence 2? (A) User (B) System

Answer: (A) User