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

Example Input: Sentence1: I recommend university arms hotel. it is rated 4 stars and is expensive. Their number is 01223351241. Sentence2: Can you help me find a place to eat serving british food in the moderate price range? Sentence3: I have several listings. Please provide the part of town you prefer so I can narrow it down. Sentence4: Ok, can you book a room for our group or are you expecting me to call them? Sentence5: Yes, I'd like a hotel in the same area. Sentence6: In the centre if possible Sentence7: can please provide more information to help us serve you better. Sentence8: No thank you that will be all for today Sentence9: I can book it for you. Sentence10: Yes please, could you book a table for 6 at 16:45 on Wednesday? Could i get a reference number too please? Sentence11: sure I can help you with that, when are you planning your stay? Sentence12: i dont mind any price. Sentence13: How about the oak bistro located at 6 lensfield road. The post code is cb21ab and phone number 01223323361. Can I book this for you? Sentence14: I actually need a moderate hotel in the centre. I don't need free parking. I will need the hotel booked for 6 people, 2 nights, on Wednesday, please. Sentence15: You have your choice of an expensive or moderate price range in that area, do you have a preference? Sentence16: Wednesday, for 2 nights. Sentence17: Ok. I have a table for 6 booked for you at the Oak Bistro. Your reference number is 9SGIM1SR . Is there anything else I could help with today? Sentence18: It needs to be close to my hotel and open late. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'm sorry. I changed my mind. I don't want a guesthouse. Are there any hotels with 2 stars? Sentence2: Great that was all I needed today, thank you. Sentence3: Is there a particular area you would like to stay in? Sentence4: There isn't a guesthouse with 2 stars and free internet available. Is there another type of hotel I can look up for you? Sentence5: Great Glad I could be of help to you. Sentence6: I have you booked in the Ashley hotel. Your reference number is CW6YMT0B . Is there anything else I can do for you today? Sentence7: No, just any 2-star hotel with free wifi will do. Sentence8: Hi, I need a guest house please. Sentence9: Do you have a specific location you want to be? Sentence10: No, but I need free wifi and I would like a 2 star guesthouse please. Sentence11: I have 3 guesthouses all in the moderate price range. Would you like me to choose one for you? Sentence12: I found 3 for you all in the expensive price range. Can you please give me the details so that I may book it for you? Sentence13: Yes, how about a guesthouse with 3 stars and free wifi instead? Sentence14: I would like it for 6 people for 2 nights starting on Wednesday. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you for contacting Cambridge TownInfo Centre, have a great day! Sentence2: I would like to go to london liverpool street on Thursday. I would like to leave after 16:00. Sentence3: Yes, I also need to find a train leaving from cambridge. Can you help me with that? Sentence4: Glad I could help you. Have a nice day. Sentence5: Thank you, you as well, goodbye. Sentence6: That's fine, could you give me the address for the gallery please? Sentence7: Thank you! You have a nice day as well. Sentence8: Absolutely, where would you like to go? Sentence9: Goodbye to you as well. I hope you have a wonderful day. Sentence10: Great! I think that is all I need. I appreciate your help today. Sentence11: There are 4 trains that run during that period, do you have a preference for your arrival time? Sentence12: Yes, but I am unable to make a booking for you. Would you like to do anything else? Sentence13: Booking was successful, the total fee is 83 GBP payable at the station . Reference number is : IG0M4C9S . Sentence14: Hi, could you tell me if Cambridge Book and Print Gallery is still open? Sentence15: Just any time leaving after 16:00, and I need tickets for 5 people. Sentence16: The address is 49 newnham road, is there anything else I could do for you? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output:
Answer: (A) User