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

Example Input: Sentence1: They can be reached by calling 01223358966. Sentence2: Take care. Goodbye. Sentence3: How do I contact the Parkside, Cambridge police station? Sentence4: I'll need to address also. Sentence5: contact the Parkside, Cambridge police station Sentence6: No, thank you. Sentence7: The Parkside Police Station is located in Parkside, Cambridge and the Postcode is CB11JG. Is there anything else I can help you with? Sentence8: Help me, please, I was just the victim of a robbery! I need help right away! Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I can definitely help you out with that. Is there a certain area of town you'd like to stay in? Sentence2: I have booked your stay at the Alexander Bed and Breakfast for Friday for 3 days for 6 people. Your reference number is DJF36WMD . Is there anything else I can help you with today. Sentence3: The train ID is TR9629, leaving at 18:09 and arriving by 19:54. Can you tell me how many tickets you would like to purchase? Sentence4: I'd like one ticket please. Sentence5: I will need to take a train from Leicester on the same day as my hotel booking. Sentence6: I am looking for a cheap hotel with free parking. Sentence7: All trips from leicester cost 37.8 pounds and take 105 minutes. Is there a specific time you would like to depart or arrive by? Sentence8: Alexander bed and breakfast is a guesthouse in town centre in the cheap price range. It has both free parking and wifi. Would you like to book a room? Sentence9: We will be arriving on Friday and staying 3 nights. Sentence10: I will need to know how many nights and what day you will be starting your stay before we finish the booking. Sentence11: I do not. I just need the train ID and what arrival time it has. Sentence12: Alright I've booked you one ticket, the total will be 37.79 and your reference number is PGY0G1J2 . How else can I help you? Sentence13: Sure, you need a taxi to Alexander Bed and Breakfast from where, and do you have an arrival time request? Sentence14: Can you please schedule a taxi to take me from the station to my hotel? Sentence15: Thank you for your help. Sentence16: I need to leave after 17:45 heading for Cambridge. Go ahead and book the closest time and give me the train ID and arrival time. Sentence17: The train arrives by 19:54 and TR9629 is the train id. Sentence18: Is there anything else I can help you with? Possibly entertainment or places to visit on your trip? Sentence19: I would prefer to be in the centre of town, and I need the hotel to include free parking. Sentence20: Yes, please. That sounds perfect. There will be six of us. Question: Who has spoken the sentence 12? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Certainly, how about riverside brasserie is in the moderate price range, serves modern European and it is in the Centre area. How many people shall I book it for? Sentence2: could you be a little more specific please; what day do you want to leave, and when do you want to leave? Sentence3: Can I assist you with anything else today? Sentence4: I found 10 trains, do you have any time you need to arrive by? Sentence5: No, I just need to leave after 13:45. Give me which ever one is earliest. Sentence6: I am looking for a modern European restaurant in the moderate range. Sentence7: I'd like to leave after 13:45 on thursday from cambridge to stansted airport. Sentence8: Not at this time, no. I just needed the information, thank you. Sentence9: Excellent. Have a good day! Sentence10: Let me think on that, could you help me book a train? Sentence11: Sure, you can choose. As long it's in the moderate price range and serves modern European food, can you tell me what area it is in please? Sentence12: I have three restaurants that meet your criteria - Restaurant Alimentum, De Luca Cucina and Bar, and Riverside Brasserie. Would you like to book a table at one of these? Sentence13: That is everything. Thank you! Sentence14: The earliest one I have leaving is 14:40 and arriving at 15:08. Would you like me to book this for just one person? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System