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

Example Input: Sentence1: Yes, please. I need to book the train for 8 people. Sentence2: enjoy your stay in cambridge! Sentence3: TR2125 leaves a 09:01 and arrives by 10:01. Would you like a ticket? Sentence4: Thanks! I also need a train to Broxbourne on Thursday. Sentence5: I'm looking for places to go watch entertainment. Sentence6: Fantastic, thank you very much. I don't need anything further today! Sentence7: There are 5 entertainment venues in Cambridge. Do you have an area in mind? Sentence8: There are quite a few options. Do you have a preference for departure or arrival time? Sentence9: I don't mind the area. can I get the address to one of them? Sentence10: Yes I was able to book that for you and your reservation number is 648C0A9S . Sentence11: Yes, I want to depart from Cambridge any time after 8:30. Sentence12: The Funky Fun House is amazing. I think you'll love it. Their address is 8 Mercers Row, Industrial Estate. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Yes please. Please make sure the restaurant has a table available for booking for seven people on sunday at 13:15. Sentence2: Glad to be of service! Goodbye! Sentence3: I would really like to get really great Chinese food. Can you suggest an expensive chinese place? Sentence4: Yes! There are 5 that I have found. One in the East, 2 South, 1 North and 1 Centre. Would you like the address of any of them? Sentence5: I have 4 swimming pools to choose from. 2 are in the north, and I have one in the east and centre. Do you have a preference? Sentence6: I don't have a area of town preference. Sentence7: Sure! Abbey Pool and Astroturf Pitch is at Pool Way, Whitehill Road, off Newmarket Road. Would you like the phone number? Sentence8: What type of food. Sentence9: Hey I am looking for a swimming pool to go to while in Cambridge. Can you find me one Sentence10: Great that's all I needed. Thanks for your help. Bye. Sentence11: naw, but i'm looking for some food Sentence12: Sure, there are a number of options. Is there a particular area of town you were interested in? Sentence13: I think the one in the East would be best. Can you give me an address for it? Sentence14: I booked you a table at Hakka (ref #7K0C5AJN). They're on the east side at Milton Road, Chesterton. Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: The Alpha Milton Guest House is of moderate price and located in the north cambridge area. Sentence2: The Hamilton Lodge happens to be moderately priced and offers free wifi and parking, would you like me to book this hotel for you? Sentence3: I want a hotel that's in the moderate price range. Sentence4: The phone number is 01223350688. Is there anything else that I can do for you? Sentence5: Your booking was successful and your reference number is BOBT5BLT . Is there anything else I can help you with? Sentence6: I can book you at the Hamilton lodge if you would like. Sentence7: I would like it also to be in the north and moderately priced. Sentence8: Yes, please book this. Sentence9: Can you help me find a 3-star hotel in the north of Cambridge? Sentence10: Great can you book it for 2 people for 4 nights starting thursday? Sentence11: I don't need it booked. I just require the phone number. Thank you. Sentence12: That is everything I needed for today. Thanks! Sentence13: You're welcome! You have a great day! Sentence14: There are 17 Chinese restaurants. Is there a particular price range or area you'd like? Sentence15: What date, time, and party size would you like to book? Sentence16: As long as it is a hotel and not any other type, then yes book it for me. Sentence17: I can recommend Golden Wok, would you like me to book a reservation there for you? Sentence18: Yes. I also need to find a restaurant that serves chinese food. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System