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

Sentence1: That would be TR5906 at 21:39 on Monday. Sentence2: The first train after 21:15 works for me. I need to book it for three people, please provide the reference number. Sentence3: Thank you so much for all your help. Sentence4: Great, have a wonderful day! Sentence5: Will you be needing anything else today? Sentence6: I am interested in cinemas specifically. Sentence7: There are 70 trains that leave from London Liverpool Street to Cambridge, what day and time would you like to leave? Sentence8: Excellent. I'd also like a train please. One that leaves from london liverpool street to cambridge. Sentence9: I can certainly book that for you! However, could you let me know what day of the week you'll be travelling? Sentence10: I'm looking for places go to in the south of town. Sentence11: No thank you. That is everything I need at this time. Sentence12: I have booked 3 tickets for you for 49.8gbp payable at the station. your reference number is ETOI91ON Sentence13: The Cineworld Cinema is in the South part of town. Their phone number is 00872208000. Would you like their address? Sentence14: I will be traveling on Monday, and I will need the reference number as well. Sentence15: Great! Thank you. What a relief. Sentence16: Yes, please give me the address and postcode. Sentence17: It's located at cambridge leisure park, clifton way and the postcode is cb17dy Sentence18: The attraction types in the south area are theatre, park, nightclub, museum, cinema, and entertainment. Which one are you interested in? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: Thank you. May I have a street address for the police station? Sentence2: welcome. at your service next time Sentence3: Thank you goodbye Sentence4: Certainly. Their address is Parkside, Cambridge. Can I assist you further? Sentence5: I want to know where I would find the Parkside Police Station. Could you tell me? Sentence6: Their postcode is CB11JG, you can reach them at phone number 01223358966. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: No, that's all. Thanks. Sentence2: Yes I was able to book a room there for one night. Reference number is PL0P458J . Sentence3: I was able to find three results for what you are looking for, may I recommended finches bed and breakfast? Sentence4: Hi, I'm looking for a 4 star hotel on the west side. Sentence5: Thank you for contacting, Cambridge TownInfo centre. Sentence6: Yes, sounds good. I'd like to book for 6 people for 5 nights from Thursday. Sentence7: I'm afraid that wont work. Can we try a different day or length of time? Sentence8: Is there anything else I can help you with today? Sentence9: Great do they have free wifi? Sentence10: They have free wifi and free parking! They're a guesthouse, not a hotel, though - is that OK? Sentence11: Great! Thanks for your help with booking that. Sentence12: Would you be able to get it for 1 night and also get me a reference number Question: Who has spoken the sentence 5? (A) User (B) System

Answer: (B) System