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

[Q]: Sentence1: Not really. Would you see if the highest rated, least expensive guesthouse has rooms for 5 nights for 6 people, beginning Wednesday? Sentence2: I would like to stay in a guesthouse that is in the south. Sentence3: I was able to book Rosa's Bed and Breakfast for you for 5 nights for 6 people starting on Wednesday. The reference number is RTITW2L5 . Sentence4: I am traveling to London Liverpool Street from Cambridge. Sentence5: There are 10 trains that meet your criteria. Do you have a preferred time that you would like to arrive by? Sentence6: Of course! The best option is the TR7092 leaving at 17:59 with a duration of 88 minutes. The price is 16.60 pounds. How else may I assist you? Sentence7: Yes, I was wondering if you could assist me in finding a train for Monday. Sentence8: There are 2828 trains available Monday. Where are you traveling to? Sentence9: I have found 29 hotels that fit your criteria for parking. What price range are you looking for? Sentence10: There are three guesthouses in the south with free parking in the moderate and cheap price ranges. Do you have a star or price range preference? Sentence11: I'd like to find somewhere to stay with free parking; I'm planning to rent a car during my stay. Sentence12: It was my pleasure to help. You have a great day. Goodbye. Sentence13: Thank you. I believe that is everything I need today. Sentence14: Yes, I need to leave after 17:30, please. I don't need tickets right now, I'll just need the price, travel time, and train ID. Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: I am planning a trip in Cambridge Sentence2: I found the express by holiday inn cambridge. It is a 2 star expensive hotel free parking and internet. The address is15-17 norman way, coldhams business park. Sentence3: Where will you be departing from? Sentence4: Thanks! i'm also looking for a place to stay in the east. Sentence5: I need to first find out what train will take me away after I am done. I need to get to Peterborough on Sunday by 21:45 Sentence6: Departing from Cambridge. I need the departure time, train ID and price. Sentence7: Okay, we've got a few options. The best looks like train TR6958 that leaves Cambridge at 20:34 and arrived in Peterborough at 21:24. The price is 13.2 pounds. Sentence8: That sounds like fun! What information can I help you find? Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Does the hotel offer free wifi? Sentence2: That is all I need today. Thank you. Sentence3: Would you be able to book the stay for four nights instead? Can i also get the reference number? Sentence4: Sadly I was unable to book you for that time period. Is there another day you'd like to check in, or possibly you could stay for a shorter time period? Sentence5: Sure thing there are 70 trains making that trip, what day and time would you like to go? Sentence6: You're welcome. Good-bye. Sentence7: Great, I think that will work. I need a room for myself for five days, starting Wed. Sentence8: No, as long as it arrives by 10:15. Sentence9: That will be great. I am also looking for a place to stay in the south part of town. Do you have any recommendations? Sentence10: There are 3 trains available. Do you have a preferred departure time? Sentence11: TR8813 departs london liverpool street at 7:39 and arrives in cambridge at 9:07. I can book tickets for you, if you like. Sentence12: Certainly, we have 3 guesthouse aylesbray lodge guest house, bridge guest house, rosa's bed and breakfast or the lensfield hotel. Which would you like? Sentence13: Yes, Rosa's does offer free wifi. Sentence14: Booking was successful for 4 nights at rosa's bed and breakfast . Your reference number is : 1G56HJK3 . Can I help you with anything else? Sentence15: Good day, I need help getting a train from London Liverpool street going all the way to Cambridge, can you help me? Sentence16: I need something in the cheap price range. Sentence17: Rosa's Bed and Breakfast fits that, would you like to book a room there? Sentence18: I would like to travel on Wednesday and arrive by 10:15. Can you help? Question: Who has spoken the sentence 15? (A) User (B) System
[A]:
Answer: (B) System