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

Input: Consider Input: Sentence1: I leave on Tuesday and need to arrive by 11:30. Sentence2: I need a train that goes to Cambridge and departs from Bishops Stortford. Sentence3: I would recommend the lensfield hotel. It's a 3 star hotel in the south. Would you like more information or do you want to go ahead and book a room? Sentence4: The TR0635 leaves at 09:29, tickets cost 10.10 pounds and the duration of the journey is just 38 minutes. Would you like me to book you a seat? Sentence5: What time does the train depart? What is the price and total travel time? Sentence6: No but I also need a place to stay that should be in the expensive price range and should include free wifi. Sentence7: Nope, wherever you recommend will be great. THanks Sentence8: We have 5 hotels that meet your criteria. Is there a particular area of town you would like to stay in? Sentence9: Yes can you please do that for me? Sentence10: No, that will be all. Thank you! Sentence11: How many people should I book this for? What day? How many days will you be staying? Sentence12: ok, the booking was successful. Reference number is : N9Y9Q569 . can i help with anything else? Sentence13: Enjoy your stay. Sentence14: Book it for 8 people and 4 nights. We will be checking in on Thursday. Sentence15: What day will you be departing and time? Sentence16: Ok, the TR0635 arrives at 10:07. Question: Who has spoken the sentence 12? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Sure, that post code is cb39al. Can I further assist you? Sentence2: I'm interested in visiting colleges while in town, can you please recommend some? Sentence3: I can recommend clare hall and christ's college. You need phone numbers for either one? Sentence4: Okay the TR5009 leaves at 18:40. Sentence5: Yes I also need a train to stansted airport on sunday Sentence6: That sounds great, do I call to book a seat or can you help me? Sentence7: No, thanks. That's all I needed. Sentence8: I'm glad I was able to help you. Thanks for using our service have a nice day. Sentence9: Sure. Where will you be departing from, and what time? Sentence10: Please book for 6 people. Sentence11: I am leaving from Cambridge. I would like to leave sometime after 18:00. Sentence12: I would like the post code for clare hall please. Sentence13: I would be more than happy to help you book! Tickets are 8.08 pounds. How many tickets would you like me to book for your trip? Sentence14: Booking was successful, the fee is 48.48 GBP payable at the station . Reference number is 4ESBHTB0 . Is there anything else I can help you with? Question: Who has spoken the sentence 7? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: There are two- one in the south and one in the centre. Which would you like to visit? Sentence2: I would like a train going to cambridge from leicester in the morning. Can you book a seat for me and let me know the reservation number? Sentence3: Booking was successful, the total fee is 151.19 GBP payable at the station. Your reference number is : MRTSNQMU . Sentence4: Thank you so much for the information. I will call them. Have a good day. Sentence5: I need to arrive by 10 am please on a Tuesday. Sentence6: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence7: Cineworld Cinema is located in postcode cb17dy. The phone number is 00872208000 and you'll have to call them directly for entrance fee information. Sentence8: There are trains that leave at 9 minutes past the hour, every hour, all morning. What time would you like to leave? Sentence9: How about train 4734? It arrives in cambridge at 09:54. Sentence10: Anytime, happy to help. Sentence11: Yeah you are very welcome. Sentence12: I would like the cinema in the south please. I need the phone number, entrance fee, and postcode. Sentence13: I'm also looking for a cinema to visit? Sentence14: Sounds good. I need 4 tickets. Question: Who has spoken the sentence 10? (A) User (B) System
Output: Answer: (A) User