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

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: Booking was successful, the total fee is 450.6 GBP payable at the station . Reference number is : G368B2VI . Can I help with anything else today? Sentence2: I would like to stay in the centre of town please. Sentence3: TR0254 Leaves at 05:40, would you like me to book that for you? Sentence4: I will be departing from Birmingham New Street on Tuesday. Sentence5: The price is 75.10 pounds and it is a 163 minutes ride. Can I help you with anything else? Sentence6: Please book 6 tickets and send me the reference number. Sentence7: No thank you. Please tell me about the ticket pricing and time of travel Sentence8: Okay, the postcode is cb11ly. What else can I help with? Sentence9: No, not yet. I just need the postcode. Sentence10: Thanks for using Cambridge TownInfo centre. Have a great day! Sentence11: I'm looking for a train that goes to Cambridge and arrives by 08:45. Sentence12: The Gonville Hotel will meet all of your needs. Would you like me to book it? Sentence13: I found two expensive hotels, one in the centre and one in the south of town. Do you have a preference? Sentence14: Again, 3 star with free wifi. I don't care about the price. It has to be in the centre, though. Sentence15: That is all, thank you for your help today. Sentence16: Yes please. I need a 3 star hotel that offers free wifi Sentence17: I found 231 trains that fit your request. Where will you be departing from? Sentence18: What price range and what star rating are you looking for ? Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System

Sentence1: Great, I also need a taxi from the attraction to the restaurant and want to arrive by the reservation time. Sentence2: Thank you. That will be all. Sentence3: yes book for 3 people at 19:30 on friday please Sentence4: I am looking for a place to go in the centre of town. I'm really interested in a theatre. Sentence5: I am also looking for a restaurant in the same area as Mumford Theatre. Sentence6: Yes, their phone number is 08451962320. May I help you find anything else today? Sentence7: There are 4 theatres in the centre I recommend Mumford Theatre. Would you like the address? Sentence8: Ok! Have a great day! Sentence9: The varsity restaurant comes highly recommended and serves international food. Would you like me to book it? Sentence10: do you have any in mind? It really doesn't matter, as long as its moderately priced and in the same general area as the mumford. Sentence11: I have booked your taxi. Be expecting a yellow Volvo. Please contact 07732601077 should you need to reach them. Sentence12: Could I get their phone number? Sentence13: What type of cuisine and price point do you prefer? Sentence14: Your reference number is UZNF1KZ5 and your table will be held for 15 minutes. Is there anything else in which I can help you? Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User