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

Sentence1: You're welcome. Is there anything else I can help you with? Sentence2: I am looking for a 3 star hotel to stay in. Sentence3: Thank you. What's the travel time? Sentence4: No, that is all I need. Thanks! Sentence5: I reserved Wednesday night at the University Arms Hotel for 5 people. Your reference number is GM90EY8A . Is there anything else? Sentence6: travel time is 47 minutes Sentence7: Lets try just booking it for one night. Sentence8: The hotel should be in the expensive price range. Sentence9: Okay, I've got two that fit the bill. One in the centre of town and one in the south. Do you have a preference? Sentence10: I am very sorry, but I was unable to book a reservation for you. Would you be willing to book a later day or would you be willing to have a shorter stay? Sentence11: I do, yes. I would like to stay in the center of town. I need it to fit five people, for 3 nights, starting Wednesday afternoon. Sentence12: Great! I will need 5 tickets. Sentence13: same day as my hotel booking. Sentence14: You are booked for Train Tr5556, your reference number is JA6WAOJC . Sentence15: I do have a four star hotel in the centre of town, but it is also unable to accommodate your guests for 3 days. Can you adjust your length of stay? Sentence16: Sure I will be able to book you a train, on what particular day will you want to travel? Sentence17: Can we book the other expensive 3 star hotel for one night starting on wednesday? Sentence18: I apologize. One night is not working either. There are guesthouses. Sentence19: How many tickets do you need? Sentence20: There are 6, 3 start hotels in Cambridge. Do you have a preference for the part of town it is located in? Sentence21: No trouble at all, I hope you have a wonderful stay! Sentence22: What about the 4 star hotels? Sentence23: Yes, I also need a train leaving after 18:30 from kings lynn to cambridge. Sentence24: Thank you very much. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: You're very welcome. Thank you and goodbye! Sentence2: The earliest train departs Leicester at 05:09 and arrives in Cambridge at 06:54. The cost is 37.80 pounds per ticket. Sentence3: That's all that I need. Sentence4: Any of those will work. Which one is your favorite and where is it located? Sentence5: I'll be departing from Leicester, headed to Cambridge. What do the prices look like? Sentence6: No problem. There are a lot of other options like boating, cinema, colleges, a concerthall, museums, nightclubs, a park, theatres and swimming pools. What are your interests? Sentence7: I also need a train on Wednesday, arriving by 19:00. Sentence8: I'm looking for something to do in the centre of town. Sentence9: Travel time is approximately 105 minutes. Sentence10: Would you like any more information on other attractions? Sentence11: I would really like it to be a attraction type. Sentence12: What is the travel time? Sentence13: Great! I found a lot of things that match what you're looking for. Do you like architecture? Sentence14: I can help you with that. What are the departure and destination cities you were looking for? Sentence15: No, that will be all. Thank You for all your help. Sentence16: I'd try the cambridge contemporary art museum, at 6 trinity street. Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: I'm sorry there are still no matches. Would you like me to check for a different type of food? Sentence2: it will be late at night around 22:00 Sentence3: I think I can find it. Could you book a table for 8 on Friday for 16:45? Sentence4: I am also looking for an attraction in the same are. Sentence5: I have eight attractions in that area. What type of attraction would you prefer? Sentence6: You're welcome! Likewise! Sentence7: Thank you so much, Have a great Day! Sentence8: I don't have a preference can you make a suggestion? Sentence9: I'll a taxi to get between the 2 places. Sentence10: I can help with that. What time do you want to depart? Sentence11: Great! Thank you! Sentence12: That sounds good can I get the postcode and phone number? Sentence13: I'm sorry there are no moderate priced steakhouses, would you like to try another price range? Sentence14: Yes, I have a match. There is a Pizza Hut Cherry Hilton. Would you like the address and phone number? Sentence15: I would recommend tenpin it is entertainment. Sentence16: Their postcode is cb17dy and their phone number is 08715501010. Sentence17: I'm sorry. Can you check the south and see if there is one? Sentence18: Sure, are there any moderately priced Italain restaurants in the south? Sentence19: You're all set. Your reference number is UTUFXTA1 . Sentence20: You're welcome they will hold the table for 15 minutes. Would you like anything else today? Sentence21: I have booked your taxi. Be expecting a yellow Toyota. Please call 07036604181 should you need to reach them. Sentence22: I'm looking for a moderately priced steakhouse. Question: Who has spoken the sentence 2? (A) User (B) System

Answer: (A) User