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

Example Input: 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
Example Output: Answer: (A) User

Example Input: Sentence1: I found the Cambridge Belfry. It is located in the west of town. Would you like me to book that for you? Sentence2: No, again, that is all, thank you. Sentence3: No, thanks. That will be all. Sentence4: Absolutely, the fitzwilliam museum's phone number is 01223332900. Is there anything else I can help you with today? Sentence5: Have a great day! Sentence6: The fitzwilliam sounds good. Could I get the phone number? Sentence7: Can I assist you with anything else today? Sentence8: There are 11 museums in the centre of town. A few are the regency gallery, the fitzwilliam museum, castle galleries, and primavera. Sentence9: I'm wanting information about museums in the centre of town. Sentence10: I'm also looking for a hotel that is cheap and includes free parking. Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: What about a moderately priced European restaurant? I need a reservation for 3 people at 14:30 on Thursday. Could you provide the reference number after making the reservation? Sentence2: I'm sorry, I do not show any Swedish restaurants. Is there another type of restaurant I could find for you? Sentence3: The departure time is still the same, 7:29. Sentence4: TR3450 leaves at 7:29. Can I help you with anything else today? Sentence5: If I may, might I suggest The Michaelhouse Cafe. They are located at St. Michae's Church Trinity Street City Centre. They have amazing food. Sentence6: train TR2061 should fit you. Sentence7: Are there any Swedish restaurants in Cambridge? Sentence8: Sounds like an excellent choice. Please proceed with making a reservation. Thanks! Sentence9: Yes an you search for christmas food? Sentence10: There are 11 different restaurants serving European food. What area of town would you like? Sentence11: I don't have a preference on the area. If you could recommend on that would be great. Sentence12: I am sorry I do not have anything listed matching that request. Any other type of food? Sentence13: I actually need the train to arrive at Bishops Stortford, not depart from. So sorry for the confusion. Sentence14: You're all booked. Reference number is OBL5NIMY . Sentence15: Alright. That is all I needed. Thank you very much. Sentence16: Have a great time. Sentence17: I also need a train to leave Friday and arrive by 08:15 from bishop stortford by cambridge. Can you give me the depart time? Sentence18: Great, can you tell me the departure time of the train from Cambridge to Bishops Stortford? Question: Who has spoken the sentence 12? (A) User (B) System
Example Output:
Answer: (A) User