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

Sentence1: I recommend university arms hotel. it is rated 4 stars and is expensive. Their number is 01223351241. Sentence2: Can you help me find a place to eat serving british food in the moderate price range? Sentence3: I have several listings. Please provide the part of town you prefer so I can narrow it down. Sentence4: Ok, can you book a room for our group or are you expecting me to call them? Sentence5: Yes, I'd like a hotel in the same area. Sentence6: In the centre if possible Sentence7: can please provide more information to help us serve you better. Sentence8: No thank you that will be all for today Sentence9: I can book it for you. Sentence10: Yes please, could you book a table for 6 at 16:45 on Wednesday? Could i get a reference number too please? Sentence11: sure I can help you with that, when are you planning your stay? Sentence12: i dont mind any price. Sentence13: How about the oak bistro located at 6 lensfield road. The post code is cb21ab and phone number 01223323361. Can I book this for you? Sentence14: I actually need a moderate hotel in the centre. I don't need free parking. I will need the hotel booked for 6 people, 2 nights, on Wednesday, please. Sentence15: You have your choice of an expensive or moderate price range in that area, do you have a preference? Sentence16: Wednesday, for 2 nights. Sentence17: Ok. I have a table for 6 booked for you at the Oak Bistro. Your reference number is 9SGIM1SR . Is there anything else I could help with today? Sentence18: It needs to be close to my hotel and open late. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System

Sentence1: That was a successful booking, your reference number is T6C83P46 . Sentence2: Thank you so much! Sentence3: Not really. Anything would be fine. Sentence4: Yes, please. I'd like to book it for 6 people and 5 nights starting from monday. Sentence5: I'm not too concerned with location, but I would like it to include internet and have a 4 star rating please. Sentence6: Do you have a preferred location or price range? Sentence7: Yes, how about 3 nights? Sentence8: I recommend the Acorn Guest House. Would you like a room there? Sentence9: I'm looking for a guesthouse with free parking. Sentence10: Booking unsuccessful. Want to try for a shorter stay? Sentence11: There are 16 guesthouses that meet those requirements. Any preference on price range? Sentence12: You're so welcome. Thank you. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System

Sentence1: Yes, could you tell me the postcode and the price range? Sentence2: Your reservation for 6 on the TR7942 train was successful, the total fee is 141.6 GBP payable at the station. Your Reference number is : 4SU5FYGN . Sentence3: The Cambridge Belfry post code is cb236bw and it is fairly cheap compared to other hotels in the area. Sentence4: I would recommend the Cambridge Belfry Hotel. It is 4 stars and has excellent ratings. Would you like more information? Sentence5: I have only found 1 train from Cambridge to London Kings Cross on Wednesday. It leaves at 23:00. Will that work? Sentence6: I will go to London's Kings Crossing from Cambridge. Sentence7: Thank you! That's all I need. Goodbye. Sentence8: That doesn't matter to me but I do want to make sure I stay somewhere with free parking. Sentence9: What have you got on the west side, in the way of places to stay offering free wifi? Sentence10: That would be fine. I also need a train that leaves after 21:30 on wednesday. Sentence11: I'd be happy to help. Where are you traveling to? Sentence12: That would be just fine can you book that for 6 people? Sentence13: You're very welcome! Goodbye! Sentence14: I have two guesthouses and two hotels. Any preference? Question: Who has spoken the sentence 12? (A) User (B) System

Answer: (A) User