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

Sentence1: Yes, I am also looking for places to go in town while we are visiting the area. Do you have anything of concert halls around the area? We love those. Sentence2: Yes, please, what is the phone number? Sentence3: I have that all booked for your stay. Your reference number for the room is ZUG88XKL . Is there anything else I can help you with? Sentence4: I am looking for a place to stay. It should be in a moderate price range and should be a star of 3. Sentence5: The phone number is 01223474144. Sentence6: Yes, I need a booking for 8 people for 5 nights starting Monday. Please include the reference number for the booking. Sentence7: Also the address to the man on the moon is 2 Norfolk Street. You have to call to inquire about the entrance fee. Have a Great day. Sentence8: We have one. The Man on The Moon. But it is located in the centre area of town. Would you like more information? Sentence9: Ok, perfect. Thanks! Sentence10: i have four results that match your request, do you need internet? Sentence11: I have the Hobsons House. It is a moderately priced guesthouse located in the west. Free wifi and internet. Can I assist you in booking a room? Sentence12: Internet is not necessary. But can you see if there is one in the west part of town and I would prefer a guesthouse. Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User

Sentence1: Great. I was finally able to get you into the Autumn House staring Friday for 3 nights and 3 people. your booking reference is C5ARPTZ2 . Sentence2: Sorry about the confusion earlier. I was able to book your room at Leverton House for Friday, 3 nights for 3 people. The reference number is U5B3PHWC . Sentence3: It was my pleasure. Goodbye! Sentence4: Can you try 3 nights instead? Sentence5: Perfect. I would like to book it for 3 people for 4 nights starting on Friday. Sentence6: Awesome. Thank you for everything! Sentence7: I can help you with a taxi. Please tell me your departure and destination sites along with your time frame. Sentence8: Yes let's try a different hotel. Sentence9: How about Cambridge Contemporary Art, on 6 Trinity St? Entrance is free. Sentence10: The Leverton House is a guesthouse located on the east side of Cambridge. What information are looking for? Sentence11: Both of them are booked solid for the days you requested. Would you like a hotel in a moderate price? Sentence12: I'd like to visit a museum if possible. Sentence13: Can they accommodate 3 people for 4 nights? Also, what are their phone numbers? Sentence14: I'm sorry. I am unable to book your stay. Could you arrive on another day or stay for a shorter amount of time? Sentence15: I'm sorry, it doesn't look like the Leverton House will be able to accommodate you. How about Allenbell or Autumn House? They are in the same area and also inexpensive. Sentence16: Can you please check for 3 nights at the same hotel for 3 people and can I have the reference number? Sentence17: I'm sorry both of those hotels are booked solid. Would you consider slightly more expensive accommodations? Sentence18: Okay. I'll need a taxi too. Sentence19: I want to leave the hotel by 22:00 to go to the Museum you mentioned. Sentence20: I'm looking for places to go in the centre of town. Sentence21: I'm also going to need a taxi, please. Sentence22: Sure. But I still need to book a hotel. Is there anything else available? Sentence23: Do you have the phone number for Autumn House's front desk? Sentence24: There are many attractions in the centre of town. Could you be more specific about what you're looking for? Sentence25: I'm looking for information on the Leverton House hotel. Sentence26: Sure. It's 01223575122. Anything else? Sentence27: They don't have a room available for 3 nights either. Anything else you'd like me to try? Sentence28: A black skoda will pick up up at Leverton House at 22:00 and bring you to Cambridge Contemporary Art Museum. The contact number is 07697068185. Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: I need to be in cambridge by 21:45. Could you find me close to that time? Sentence2: I'm looking for a place to stay in the north. Sentence3: Yes. I need a train from Ely to Cambridge. Sentence4: The trains departs from Ely every two hours at 5:52, 7:52 so on. What time do you plan to travel? Sentence5: I would like to leave on Tuesday please, can I have the price and depature times also? Sentence6: No, I am sorry another day perhaps or a shorter stay might be able to get that booked for you. Sentence7: Your best bet would be TR1537 which arrives in Cambridge at 19:52. The price is 4.40 pounds per ticket and the departure time is 19:35. Sentence8: Acorn guest house is in the north, would that work for you? Sentence9: Booking was successful. Your reference number is NTQSJSP0 . Do you need further assistance today? Sentence10: Yes if it has free parking, meals, pool and wifi. I want it to be in the expensive price range. Sentence11: Thank you! Please feel free to contact us if you change your mind or need further assistance! Have a great day! Sentence12: Can we try it for 1 night? Sentence13: And which day would you like to leave on? Sentence14: How about Ashley Hotel in the north part of town? It's on Chesterton Road. Sentence15: I am looking for a hotel in the north part of town with free parking, a 2 star rating, and in the moderate price range. Sentence16: Sounds good. Can you book it for four nights starting on Tuesday? Sentence17: That is all I need. Thank you. Sentence18: I'm sorry, there are no expensive hotels in the north area. Acorn Guest House is moderately priced, and does have free parking and wifi. Would you be interested? Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System