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 sure can. What type of place are you looking for? Sentence2: I'm looking for a place to stay, can you help me out? Sentence3: I'm looking for a guesthouse that's moderately priced. Sentence4: Please provide me with attraction type preference that you may have so that I can narrow down to a few choices. Sentence5: There are 11 options which fit your requirements. What part of town do you prefer? Sentence6: Thank you very much. I think that is all the information I need today! Sentence7: Perfect I have you booked at the Avalon for 5 nights and 5 people, the reference number is I3B3EKYI . Is there anything else I can help you with? Sentence8: Preferably in the centre. Would like a reservation for 5 people, for 5 nights beginning Wednesday. Also looking for places to go in the centre as well. Sentence9: Sure, let us try the North. Sentence10: I need it in the centre and you can make a suggestion. Sentence11: I would either recommend Avalon or Limehouse. Both are great guesthouses. Which of those would you like me to book for you? Sentence12: Please give me their phone number and postcode Sentence13: Do you have a specific area or attraction type in mind? Sentence14: I would like to be in the centre, please provide me with an entrance fee, a phone number and post code. Sentence15: There are no places to stay in Centre matching your request. Would you like to try another part of town? Sentence16: Something moderately priced, but a 4 star accommodation. And I would like free wifi too please. Sentence17: I'm also looking for places to go around town Sentence18: You are welcome. Enjoy your trip. Goodbye Sentence19: Let's go with the Avalon. Could you make it for 5 people for 5 nights? We want to arrive Wednesday. Sentence20: Ruskin gallery is a museum in the centre of town and very popular. The entreance is free. Sentence21: That's great information, but so many options! Is there a part of town that you would like to stay or other amenities you would like to have while in town? Sentence22: The phone number is 01245493131 and post code is cb11pt. Question: Who has spoken the sentence 12? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Thanks again for helping to find me a place to eat. I have the reference number T44KC552. Sentence2: I am looking for a Cuban food place, in the east. Sentence3: No, thank you. You have been very helpful. Have a great day. Sentence4: Here is the address and the phone number: 7 Barnwell Road Fen Ditton, 01223244955. Sentence5: Yes, try that. Sentence6: Can you check again? The only thing I'm interested in is a moderately priced Cuban restaurant in the east. Sentence7: I apologize booking was unsuccessful. Would you like me to try Rajmahal Sentence8: Do you have a moderately priced Indian restaurant in the east? Sentence9: Yes I have 2. Curry Prince and Rajmahal. Sentence10: I will try the Curry Prince. Can you book a table for 4 people on Monday at 17:30? Sentence11: I have you at Rajmahal, Reference number is : T44KC552 . Anything else you need? Sentence12: I am sorry but there aren't any restaurants matching your criteria. Can I help you with something else? Sentence13: Enjoy your meal at the rajmahal. Have a great day. Sentence14: I apologize I am still not showing any restaurants that meet your criteria. Is there another type of cuisine you would prefer? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I would recommend the Bridge Guest House. It's on the south side of town. Sentence2: The slug and lettuce is a gastropub in the centre of town. Would you like to book a table? Sentence3: No. I just needed the area. Thank you! Sentence4: I'd like it to be a guesthouse with free parking included please. Sentence5: Great! Thats all the information I needed. Have a great day. Sentence6: Yes, please. I need a 3-star hotel with free wifi. Sentence7: thank you for calling. Sentence8: The bridge guest house is moderately priced and is at 151 hills road, postcode cb28rj. Sentence9: I need to find a certain restaurant called the slug and lettuce. Sentence10: You are very welcome. Is there anything else I can help you with today? Sentence11: What is the price range? Can I also get the address and postcode? Sentence12: You are welcome. Take care. Sentence13: Thank you, and goodbye. Sentence14: I found 5 hotels that are available, do you have a price range or hotel style you'd prefer? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System