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

Sentence1: Pick any of them, please. Book it for 6 people and 3 nights, starting thursday. Sentence2: I need something with free parking and a 4 star rating. Sentence3: I have 24 guesthouses. Let's narrow it down a bit. Do you have a price range? Sentence4: I am showing 18 colleges. Is there a certain area of town you would like? Sentence5: What is the postcode of Corpus Christi? Sentence6: Booking was successful. Reference number is : 2WPLODLS . is there anything else i can help you with? Sentence7: Not really. Which do you think would be the most interesting to visit? Sentence8: That cuts it down to 16. I can recommend the Acorn guest house, or do you have a pricerange or area of town you want to stay in? Sentence9: I would suggest Christ's college in the city centre or Corpus Christi college in the west. Christ's college is free and Corpus Christi costs 2 pounds? Which do you want? Sentence10: Hello, any interesting colleges in town? Sentence11: Their postcode is cb21rh. Can I assist you with anything else? Sentence12: I am looking for a guesthouse to stay in. Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: No, but I would like to find a cheap priced south african restaurant. Sentence2: I'm sorry, but we don't have and South African restaurants in the area. Is there a different type of food I can help you find? Sentence3: I would say let's look for an attraction first. Can you recommend something to do in the south part of town? Sentence4: I will go with whatever you recommend, I just need the attraction type and postcode. Sentence5: Hi, I am looking forward to trying some of your local restaurants. I do need help with some other places to go in town while I am there though. Sentence6: There are several nice parks in the area as well as theaters and museums. Sentence7: The byard art museum postal code is cb21sj. Can i help you get transportation to and from the museum? Sentence8: Try Portuguese then. Sentence9: Thanks so much for putting up with me! You've been great! Sentence10: 3 people will be dining. Please give me a reference number once you finish the reservation Sentence11: I would rather be in the south area. Sentence12: What is your food type preference? Sentence13: There are two results. Both are cheap. Do you prefer the south or centre? Sentence14: I have finished booking it for Thursday at 12:15 for 3 people at Nando, your reference number is TDQZGM38 . Do you need anything else? Sentence15: Can you book a table for me there on Thursday at 12:15? Sentence16: The only option is nandos. Sentence17: You are welcome enjoy Sentence18: How many people are in your party? Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: No, thank you. I am not ready to reserve quite yet. Could you just tell me the postcode for The Alexander Bed and Breakfast? Sentence2: No, that should do it, thanks! Sentence3: Is it also in the cheap price range? Does it include free wifi? Sentence4: We're happy to be of service. Enjoy your stay in Cambridge! Sentence5: Yes, thank you. Sentence6: I have 9 entries meeting all 3 requirements, are you looking for a certain part of the city? Sentence7: I want to go to Kings Lynn on Wednesday. Sentence8: Sure. The Alexander bed and breakfast is in the centre, and their phone number is 01223525725. Should I book you a room? Sentence9: Actually I would just like the postcode and telephone number. Sentence10: Ok great I will book you a room for 4 people. How many nights would you like? Sentence11: Yes that sounds perfect, I will need 3 tickets and a reference number please. Sentence12: I have train TR2182 departing Wednesday at 22:11 and arriving in Kings Lynn at 22:58. Would that work for you? Sentence13: I was able to book you 3 tickets for that train. Your reference number is NYP3RNM4 . Is there anything else I can help you with? Sentence14: Hi. I need a train leaving from Cambridge anytime after 21:30. Sentence15: No - could you please choose one for me? I don't like to stress out too much about travel arrangements. Sentence16: I will need some more information to book a room, what day will you arrive, for how many people and how many nights? Sentence17: I am also looking for a place to stay, preferably a guesthouse that includes free parking. Sentence18: I will be arriving Wednesday. We will need a room for 4 people. Sentence19: Where do you want to go? Sentence20: The postcode is cb12de. Is there anything else I can help you with? Sentence21: You will have to contact the hotel directly to do that, do you still want to book the room? Sentence22: Sure. The postcode is cb12de and the phone number is 01223525725. Is there anything else I can help you with today? Sentence23: Ok. I am trying to book the hotel for 4 people for 1 night. You wanted the hotel for Wednesday night, right? Sentence24: Let's just do one night for now. Can I cancel the reservation if I decide I don't need it? Sentence25: I would like to book the room and get the reference number please. Sentence26: There are 21 guesthouses that offer free parking, did you have any other requirements? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System