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

Sentence1: I have your taxi booked. Look for a blue volkswagen, contact number 07655267463. Is there anything else I can help you with? Sentence2: I need to book a place to stay with a star of 4. I don't need free parking. Sentence3: Can you please provide me with the address, telephone number and the cost of admission. Sentence4: Thank you. Enjoy your stay Sentence5: I now need a taxi to get to the church from the hotel. I would like to leave the hotel by 15:45. Can you book that for me? Sentence6: I don't care about location, just would like a moderate price with 4 stars please. Sentence7: We have 44 attractions in the centre of town Broughton House Gallery is a museum we have available. Sentence8: We have 11 in the moderate range. They are all a guesthouse accommodation. Would you like one of these? Sentence9: I need one with free wi-fi. Sentence10: I have you booked. The reference number is WPGQ4ADJ . Sentence11: After that I'm also going to need the reference number. Sentence12: OK, now can you tell me about some of the attractions in the center of town? Sentence13: I would also need to book it for 4 nights. Sentence14: No, that is all. Thanks so much. Bye. Sentence15: One person, and I'd like to arrive on Tuesday. Sentence16: We have over 20 fine hotels. Do you have any preferences of cost or location? Sentence17: How long do you want to stay? Sentence18: Can i book one on tuesday? Sentence19: OK, let me see what I can do. Sentence20: How about All Saint's Church at 01223452587 in the centre? It's free. Sentence21: before I look for that, could you let me know how many people are staying and what day you'd like to arrive? Sentence22: I have two: a and b guesthouse in the east and avalon in the north. Would one of these work for you? Question: Who has spoken the sentence 18? (A) User (B) System
Answer: (A) User

Sentence1: Is Aylesbray Lodge a guesthouse? If not, is there a guesthouse that fits? Sentence2: I can help you with that. Do you have a price range? Sentence3: I guess we can go with the moderately priced one. Sentence4: I don't have a preference. I'm just looking for a 4 star hotel that has free wifi. Sentence5: Booking was successful.Your Reference number is : 76HG81V6 . Anything else I can do for you? Sentence6: I need rooms for 8 peoples staying for two nights starting Wednesday. Sentence7: Aylesbray Lodge guest house is moderately priced and has free wifi. Would you like me to make a reservation for you? Sentence8: I'm looking for a hotel in the south part of town. Sentence9: Yes, it is a guesthouse. When would the stay begin and for how long? Sentence10: i have 2 locations that match your requirements, one is cheap, one is moderate. which would you prefer? Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: I need to find a place that serves European food to eat at. Sentence2: You're welcome. Have a lovely day. Sentence3: I'd like to depart Cambridge on Sunday sometime after 9:45. Sentence4: Where would you be going to? Sentence5: I appreciate all your help. Goodbye. Sentence6: What price range are you looking for? Sentence7: I have you booked on that train. Your confirmation numbers is NLV3A4JF . Sentence8: That sounds perfect! Can you book me 6 tickets for that train please? Sentence9: I have 11 results for european restaurants, what area would you like to dine in? Sentence10: I need one in the expensive range. Sentence11: I certainly can. Which departure and destination did you have in mind? Sentence12: Wine shop sound good. Could I have their address and postcode please? Sentence13: In the centre, sorry didn't I mention that? Sentence14: I'll be heading to Stevenage. Sentence15: I have the TR8464 train leaving at 11:21 and arriving at 12:10. Would that be good? Sentence16: Thank you so much. Can you help me book a train too? Sentence17: Their address is 40270 King Street City Centre and the post code is cb11ln. Sentence18: There are three options: eraina, michehouse cafe, and darry's cookhouse and wine shop. Which would you prefer? Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User