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

Sentence1: I think you'd like TR8842 train, it costs 23.60 pounds. Sentence2: Thanks, it would be helpful if you also told me what time TR8842 leaves. Anyhow, I just got paid. Can you find me a high-end eatery serving European cuisine? Sentence3: No thank you. I'll just need the address for an expensive restaurant that serves European food. Sentence4: Train TR8842 leaves london kings cross at 15:17 on friday and arrives at cambridge at 16:08. Can I provide you more information or book it for you? Sentence5: Arrival time is not important. I just need to leave after 14:15. I will need the train ID and the price, please. Sentence6: Sorry! As I said, it's at Free School Lane City Centre. Can I help you with anything else? Sentence7: Hi, could you help me find a train going to Cambridge? Sentence8: Is there a time you would like to arrive by? Sentence9: Where and when are you departing from? Sentence10: I would like to leave on Friday Sentence11: No, that's it. Thank you. Sentence12: which side of town is most appropriate for you? Sentence13: Have a lovely day, goodbye. Sentence14: I am leaving from London Kings Cross after 14:15. Sentence15: I'm sorry, but I think you gave me the phone number. I need the address, please. Sentence16: I don't have a preference really, please recommend one. Sentence17: no. i just need the address Sentence18: What day would you like to leave? Sentence19: its address is 01223368786. is that it? Sentence20: How about the eraina located at Free School Lane City Centre. Would you like reservations? Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Thank you for confirming that. One more detail: Did you have a particular time period in mind for your trip? Sentence2: I would like to travel on a Saturday. Sentence3: Yes. I want to arrive in Cambridge by 21:30. Sentence4: The Ruskin Gallery is a museum. Do you need anything else? Sentence5: There are numerous places in the Centre, can you tell me what type if place or activity you would like to do and maybe we can narrow it down? Sentence6: The Cambridge University Botanic Gardens are 4 pounds, and the Regency and Ruskin Galleries are free. Sentence7: The address for the regency gallery is 39 fitzroy street and the phone number is 01223365454. For ruskin gallery it's anglia ruskin university, east road, their number is 01245493131. Sentence8: I am looking for a train leaving broxbourne. Sentence9: The centre, please. Sentence10: I should have confirmed that I am indeed going to Cambridge. Sentence11: I need a place to go in town. Sentence12: I'm afraid we don't have a zoo, although if you like plants there is the Cambridge University Botanic Gardens. There are several galleries, such as Regency Gallery and Ruskin Gallery. Sentence13: You are welcome. Have a nice day. Goodbye. Sentence14: That will be all, thank you for your help. Sentence15: No I don't need to book a seat, but can you tell me the departure time. Sentence16: Please, I need the address and phone number for the Regency and Ruskin Galleries. Thanks. Sentence17: TR7846 will get you into Cambridge by 10:32. Would you like me to book a seat on that for you? Sentence18: I can help with that! Your destination will be cambridge I presume, what day would you like to travel? Sentence19: Yes I want to travel on a Saturday. Sentence20: Of course. The departure time for that train is 09:32 with an arrival time of 10:32. It's a 60 minute ride. Anything else I can help with? Sentence21: How about a zoo or art gallery? Sentence22: Where is your destination located? Sentence23: Are there entrance fees to these places? Sentence24: One more thing. Would you confirm the attraction type for the regency gallery and ruskin gallery? Sentence25: There are hourly trains from 5:32 onward. Did you have a particular time of day in mind? Sentence26: Did you have a specific place or area in mind? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: Yes. Book for 2 people for 4 nights on thursday and I'll need the reference number too please Sentence2: Okay, great! Enjoy your day. Sentence3: I have your table for 2 booked at the Bedouin. Would you like anything else? Sentence4: Your booking was successful. Your reference number is Q5BKFIC3 Sentence5: The reference number is 0LG9G1BT . Is there anything else I can help you with? Sentence6: We have one restaurant, the Bedouin. Would you like me to make you a reservation? Sentence7: I need the reference number too please. Sentence8: 2 people for Thursday at 19:00 please Sentence9: I was unable to find anything matching that. Would you like to try again? Sentence10: How about African food in general? Sentence11: yes please. Sentence12: The Limehouse is a moderately priced guesthouse on the north side of Cambridge. They are a 4-star establishment and offer free parking and Internet. Would you like to make a reservation? Sentence13: Thank you. Can you find us some good eats, too? We'd like something moderately priced that serves South African cuisine. Sentence14: I would be happy to book a reservation for 2. What day are you looking at and time? Sentence15: I am looking for a hotel in the Cambridge area called the limehouse. Sentence16: Thank you that is all I need. Question: Who has spoken the sentence 14? (A) User (B) System
Answer: (A) User