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: Where will you be travelling to? Sentence2: Yes but I need that to be booked for 3 people. I would like the reference number please. I also need a place to stay as well. Sentence3: Sure thing, I would suggest this one acorn guest house. Sentence4: I will be traveling to Leicester and would like to arrive before 21:15. Sentence5: I would like a 4-star guesthouse in the north in a moderate price range. Sentence6: Great can you book that for me from Sunday for 2 nights for 4 people. Sentence7: I would like to arrive by 21:15. Sentence8: When could you like to arrive by? Sentence9: Your booking was successful. Your reference number is 7ZJ4CTTG . Will that be all for today? Sentence10: Booking was successful, the total fee is 113.4 GBP payable at the station. Your reference number is ABKFF3SH . What type of place are you looking for? Sentence11: I'm looking for a train that leaves from Cambridge on Tuesday. Sentence12: I have the TR8207 that will arrive by 21:06. Would you like me to book that for you? Question: Who has spoken the sentence 4? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Can you recommend a moderately priced restaurant in the South part of town? Sentence2: could i have the address and phone number please? Sentence3: sure, pizza hut cherry hinton is located at G4 cambridge leisure park clifton way cherry hinton and the phone number is 01223 413000. Is there anything else I can help you with? Sentence4: Would you prefer Italian or Modern european food? Sentence5: I don't care. Either one is fine. Sentence6: No, that is all I needed. Thank you. Bye bye. Sentence7: How about Pizza Hut Cherry Hinton. It serves Italian food, is in the moderate price range, and in the south part of town. Sentence8: Goodbye. Question: Who has spoken the sentence 5? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: That is all I need, bye. Sentence2: Wait! Before you go, can you tell me about your favorite college to visit in town? Sentence3: What is the address and phone number of Queens' College? Sentence4: What is the price? Sentence5: I need to leave from cambridge and leave after 08:30 Sentence6: No thank you. That's all I need. Sentence7: You're welcome, have a great day! Sentence8: Absolutely. Their postcode is cb39et. Is there anything else I can do for you? Sentence9: Goodbye and enjoy the rest of your day! Sentence10: Yes, one more thing. May I have the postcode for Queens' College, please. Sentence11: Hi there. I would like to find a train to Ely for Thursday. Sentence12: There is Queens' College on the west side of town. Sentence13: The price is 4.40 pounds. Is there anything else you want? Sentence14: I have a train TR1923 leaving cambridge at 9:50 and arriving in ely at 10:07 on thursday. Would you like to reserve this? Sentence15: The address is silver street and the phone number is 01223335511. Is there anything else I can help you with? Sentence16: No problem, what time would you like to arrive in Ely? Question: Who has spoken the sentence 12? (A) User (B) System
Output: Answer: (A) User