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

Sentence1: We have three places that serve international cuisine that you should like. Do you prefer East or Centre? Sentence2: Yes, that would be great. Can you book a table for 4 people at 11:30 on Sunday? Thanks Sentence3: Can you help me find a corsica restaurant? Sentence4: I also need a train that will arrive by 18:15. Sentence5: TR7786 can have you there by 17:51. It costs 23.60 pounds. Sentence6: Sure, which stations are you traveling between? Sentence7: Then can you find me one that serves international food? Sentence8: The Centre is fine. I need a table for brunch on Sunday. Sentence9: I was able to book your party of 4 into Bloomsbury Restaurant on Sunday at 11:30 , Reference: 4ni28yk5 . Can I assist you further today? Sentence10: There is no restaurant serving corsica food in the town. What is another type of food you would like me to search for? Sentence11: What is the travel time? Sentence12: Goodbye, enjoy the rest of your day! Sentence13: The trip takes 51 minutes. Would you like me to book that train for you? Sentence14: I recommend the Bloomsbury Restaurant. It's located at Crowne Plaza Hotel, 20 Downing Street. It's a moderately priced restaurant. Can I book this for you? Sentence15: not now. that is all i needed. have a good day Sentence16: I'll be leaving Cambridge on Monday and I'd like to arrive to London Kings Cross by 18:15. Is there anything available? What time will it leave? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System

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: It is located on Cherry Hinton Road and phone is 01223446104 is there any thing else Sentence2: Would you like a reference number? Sentence3: You have two options; TR2016 departs at 05:21 and TR4376 departs at 07:21. Would you be interested in either of these? Sentence4: Where are you leaving from and going to? Sentence5: I need to go from cambridge to stevenage. Sentence6: I need a thursday train that arrives by 8:30. Sentence7: Either one is fine. I need 8 tickets please. Sentence8: Yes I would like the reference number, can you also give me information about Cherry Hinton Hall and Grounds? Question: Who has spoken the sentence 3? (A) User (B) System

Answer: (B) System