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

[EX Q]: Sentence1: I can book you at the university arms hotel. It has a 4 star rating, free parking and wifi. Does this interest you? Sentence2: What will be the first day you will stay and how long will you be staying? Sentence3: I'm sorry but you'll have to book another day or a shorter stay. When would you like to stay? Sentence4: Yes. That would be great. Sentence5: Awesome, thanks! I think that takes care of everything I needed. Sentence6: Booking completed! Please look out for a Grey BMW, their contact number is 07130839627. Is there anything else I can help with? Sentence7: Certainly. I have many available. Is there a particular area you are looking in? I have several in the west and centre. Sentence8: Can you see if they have just 1 night available? Sentence9: I want to stay for 5 nights starting on Tuesday. Sentence10: Corpus christi is 2 pounds, which is in centre. Sentence11: Can you give me the entrance fee for one of the colleges in the centre? Sentence12: Okay great please enjoy your stay and don't hesitate to call us back if you need anything else. Sentence13: I am traveling to Cambridge and excited about seeing location attractions. Could you help me find a place to go, like a college? Sentence14: I need a taxi please between the 2 places. I want to leave the attraction by 2:30. Sentence15: Your booking was successful with a reference number of S1HTVV32 . Is there anything else I can do for you today? Sentence16: I'm also looking for a hotel in the centre. I don't want to stay in a guesthouse. It needs to be a hotel. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I don't have any guesthouses listed in that price range. Would you like something in the moderate price range possibly? Sentence2: Will you be departing from cambridge? Sentence3: Sure I have a train arriving at 14:10 on a Tuesday. Would you like to book a seat? Sentence4: Okay, I made you a reservation at the Acorn Guest House. Check in is Friday for a party of 5 and your reference is CGDK1YT1 . Will that be all today? Sentence5: I just need to know how long the travel time it. Sentence6: Great. That is all. Sentence7: Ok! Have a great day! Sentence8: Sure check moderate for me. Sentence9: TR0743 is leaving cambridge at 13:21 and the cost is 12.80 pounds, how many tickets will you need? Sentence10: Might I recommend the Acorn Guest House? It's a moderately priced, 4-star guesthouse in the north area. Sentence11: Yes please. May I have the departure time, train id, and price? Sentence12: Yes, I will be departing from Cambridge. I also need to leave on Tuesday. Sentence13: I need to find a train that goes to stevenage and arrives by 17:30. Sentence14: I would also like to find an expensive guesthouse. Sentence15: The travel time is 49 minutes. Sentence16: Sounds great, can you please book me for 5 people and 4 nights starting on friday? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I am also looking for a train from Cambridge to Leicester. Sentence2: Hobsons House is a moderately priced 3-star guesthouse on the west side. Their address is 96 Barton Road, cb39lh. Their phone is 01223304906. They offer free wifi and free parking. Sentence3: I am looking for a hotel called Hobsons House. Sentence4: When would you like to begin your stay at Hobson's House? Sentence5: Perfect, I will take that trip for 30.24 pounds. Thank you! Sentence6: Booking was successful. Reference number is : ALSEXHLY . Sentence7: I would like my stay to begin on Saturday. Sentence8: I need to leave after 17:45 on Saturday. I need the price, travel time and train ID of the route is possible. Sentence9: Excellent. I would like to book a stay for 2 people for 5 nights, please. Sentence10: There is a train leaving Cambridge at 18:21 and arriving at Leicester at 20:06. The trainID is TR6034 and the trip duration is 105 minutes. A ticket is 30.24 pounds. Sentence11: What day and around what time would you prefer to depart? Sentence12: You're welcome. Enjoy your time in Cambridge! Sentence13: How many tickets will you need? Sentence14: Actually, I am not ready to book them. Thank you for your help, I am all set. Good bye. Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]:
Answer: (A) User