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 am sorry, but the Leverton House was not available for your party on Tuesday. Would you like me to look for another hotel? Sentence2: In what area would you like? Leverton is in the East, should the hotel be in the same area? Sentence3: Is there another hotel available in the same price range? Sentence4: Hi, I'm looking for a hotel called Leverton House. Sentence5: No, you said Leverton wasn't available. Please just book a different hotel in the same price range as Leverton. Thanks. Sentence6: I have booked you a room at the Alexander Bed and Breakfast at 56 Saint Barnabas Road. Your reference number is JGTE0KGB . Is there anything else today? Sentence7: No, I don't care about the area, just the price. Recommend me one? Sentence8: You're welcome. Good-bye. Sentence9: The Leverton House is a guesthouse in the east of the city. Their phone number is 01223292094. Sentence10: Yes Leverton is in the cheap price range. Would you like me to book it for you? Sentence11: Thank you. Please book a reservation for 6 people for 2 nights starting tuesday. Sentence12: That will be all, thank you. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No I have nothing in particular in mind. Sentence2: Thanks. I am also looking for somewhere to eat near the museum. I'd like to have Chinese food for dinner. Sentence3: Let's do a museum. Can you please send me the postcode, and phone number please. Sentence4: we can do Museum of archaelogy and anthropology, it is in university of cambridge, downing street. code number cb23dz. their phone number is 01223333516 Sentence5: There are 3 options. I recommend jinling noodle bar. Sentence6: Great, now can you also book a taxi for me? I need to make sure I get to the restaurant from the museum in time for that reservation. Sentence7: Booking completed! The car type is a black honda and the contact number is 07016630526. Can I help with anything else today? Sentence8: Thank you and enjoy the city! Sentence9: What time would you like? Sentence10: Thanks, that's it for now! Have a good day! Sentence11: There is lots to see in the centre. Were you looking for a certain type? Sentence12: Booking was successful. The table will be reserved for 15 minutes. Your Reference number is : YNWUFRQ4 . Sentence13: A moderate price range would be best. Sentence14: There are 10 Chinese restaurants in the centre. What is your price range, please? Sentence15: Would you be interested in architecture, a museum, or perhaps theatre? Sentence16: I'd like to find an interesting attraction in the city center. Sentence17: I would like to reserve it for 11:15 for 8 people. Sentence18: That sounds interesting. Can I get reservations for Thursday? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: There are 5 trains that meet those requirements. TR5504 would have you arrive by 13:27. Can I help you buy a ticket? Sentence2: If you have no particular requirements, you might like the Autumn House, which is an inexpensive 4 star guest house on the East side. Sentence3: I want to book it for one person, four nights starting on Sunday. Sentence4: Yes it does. Sentence5: Does it include free internet? Sentence6: It doesn't matter, and I don't need internet access. Sentence7: Fantastic! Have a good day. Sentence8: I can't rest yet. I still need a train. I am traveling from Cambridge to London liverpool street. Can you help me out? Sentence9: Booking was successful. Reference number: 9COW8ZI5 . Is there anything else I can help you with? Sentence10: You can rest now, your reference number is BQ8VSRRZ . Is there anything else I can assist you with today? Sentence11: I'm exhausted. Can you find me a guesthouse somewhere on the east side of town? Sentence12: I'd need to leave on thursday and arrive by 14:30. Sentence13: No, that is all, thank you. Sentence14: Absolutely. First, I need a few more details. What day will you be traveling? Sentence15: Yes please for one. I will also need a reference number. Sentence16: Sure. There are both moderate and cheap priced guesthouses in this area. Which would you prefer? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User