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

[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
[A]: Answer: (B) System

[Q]: Sentence1: Pick any of them, please. Book it for 6 people and 3 nights, starting thursday. Sentence2: I need something with free parking and a 4 star rating. Sentence3: I have 24 guesthouses. Let's narrow it down a bit. Do you have a price range? Sentence4: I am showing 18 colleges. Is there a certain area of town you would like? Sentence5: What is the postcode of Corpus Christi? Sentence6: Booking was successful. Reference number is : 2WPLODLS . is there anything else i can help you with? Sentence7: Not really. Which do you think would be the most interesting to visit? Sentence8: That cuts it down to 16. I can recommend the Acorn guest house, or do you have a pricerange or area of town you want to stay in? Sentence9: I would suggest Christ's college in the city centre or Corpus Christi college in the west. Christ's college is free and Corpus Christi costs 2 pounds? Which do you want? Sentence10: Hello, any interesting colleges in town? Sentence11: Their postcode is cb21rh. Can I assist you with anything else? Sentence12: I am looking for a guesthouse to stay in. Question: Who has spoken the sentence 11? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: No, that's ok. I just wanted to know the arrival time. Thanks. Sentence2: No, that sounds great! I also need to travel by train from Cambridge to Peterborough. Sentence3: thank you and enjoy your stay! Sentence4: To clarify, you need to leave cambridge by train to peterborough? I can help you with that. What day and time? Sentence5: I'm looking for a museum to visit. Sentence6: I have 23 to choose from. Do you have a preference on location to help narrow the search? Sentence7: Well, museum of archaelogy and anthropology is located at university of cambridge, downing street, cb23dz, centre. Would you like another musuem? Sentence8: I need to leave on Friday sometime after 18:00. Sentence9: I have a few options, the earliest leaves at Cambridge at 18:06 and arrives in Peterborough at 18:56. Tickets are available, would you like to book? Sentence10: 23? I had no idea! I was looking for postcodes, areas and addresses. Question: Who has spoken the sentence 7? (A) User (B) System
[A]:
Answer: (B) System