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, two people for two nights on sunday. Sentence2: Yes! Can you book for 2 people at 14:15 on this Sunday? Sentence3: Reference number is : E9BM21NJ . Is there anything else I can assist you with? Sentence4: Are you sure there is nothing more I can help with today? Sentence5: Great that will be all we need. Sentence6: Can you help me find a place to eat in the expensive price range in the south part of town? Sentence7: I have one matching result. It is the lensfield hotel. Do you want to reserve a room? Sentence8: I was able to book your party of 2 into The Chop House on Sunday at 14:15 Reference: MUWLBLLW . May I assist with more today? Sentence9: What about the cambridge chop house. The address is: 1 Kings Parade. You you like me to book a table? Sentence10: Do you have a reference number? Sentence11: This time that is everything, thank you for your help. Sentence12: Actually yes I will be needing somewhere to stay too please. A 3 star hotel in the same area and price range as my restaurant. Sentence13: You are welcome enjoy. Sentence14: Ok, I've booked the Lensfield Hotel for you for 2 people and 2 nights starting Sunday Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: No, I'm actually looking for something in the north. Is there anything available there please? Sentence2: I've made the reservations for you. The reference number is NFKR3VXL . Sentence3: Hi, few questions. I am looking for a restaurant called the Little Seoul. Also, could you give me the phone numbers, address, and entrance fees for both those places? Sentence4: ok I have a black volvo booked for you Sentence5: Ok, thanks. Can you reserve the restaurant for me for 5 people at 14:30 on Sunday? Sentence6: Can I please get the taxi company's phone number in case I need it? Sentence7: you can reach them on 07704971911 Sentence8: Abbey pool and astroturf pitch is in the east part of town if that would work for you? Sentence9: Sure! Let me get the pool information first. I found one that is an outdoor pool and one that is a learner pool. Which would you prefer? Sentence10: The outdoor pool would be best. For the restaurant I need to reserve it for 5 people at 14:30 on sunday. Please give me the reference number of the reservation. Sentence11: Yes I need a taxi to get from the pool to the restaurant. Sentence12: You are welcome. Can I assist you with anything else? Sentence13: I'm looking to swim today. Is there anywhere I can go? Sentence14: the outdoor pool is called jesus green outdoor pool located at between victoria road and the river cb43px Sentence15: enjoy your time in Cambridge! Sentence16: Thank you so much for your help. Sentence17: Sure, there are two in the north. Would you like their information? Sentence18: Thank you. That was all I needed. Goodbye. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: What side of town would you like to stay on? Sentence2: You're welcome, have a great day! Sentence3: What is your price range? Sentence4: Ok, I've got you a cab from hobsons house to graffiti, arriving by 17:45. The car is a yellow lexus. Contact number : 07292320210 Sentence5: Do you mean that it is close to the restaurant? Can you give me the phone number? Sentence6: cool, i need a place to stay, too. Sentence7: I would like to find a 3 star guesthouse that has free parking. I would need the area it is in and a phone number. Sentence8: There are no asian oriental places in that area of town. Would you like a different type of food? Sentence9: I can, what type of food are you looking for? Sentence10: thank you for your help. That's all I need today. Sentence11: Sorry, yes, that is what I meant. The phone number is 01223304906. I can book that for you if you'd like. Sentence12: Booking was successful, table will be reserved for 15 mins. Reference number is : I8UTT26J . Sentence13: What about British food in that part of town? Sentence14: I would like a three star place, if you have one. Sentence15: We were thinking we would like some Asian Oriental food, if available. Sentence16: If you'd like to stay near the hotel, the Hobsons House is a guesthouse in the west. It is moderately priced and has free parking. Would you like information on that? Sentence17: Let me try Graffiti out. Can you book it for 2 people on Saturday at 17:45? Sentence18: I don't really care. I do need free wifi, but parking doesn't really matter. Sentence19: I'm looking for somewhere to eat in the west. Can you help me out? Sentence20: In british cuisine, you have three choices. Saint John's Chop House is moderately priced, while Graffiti and Travellers Rest are expensive. Sentence21: No, thank you. I do need to book a taxi from the hotel that arrives at the restaurant by the reservation time, though, please. Sentence22: Your table is booked. Reference number is I8UTT26J . Question: Who has spoken the sentence 18? (A) User (B) System
Example Output:
Answer: (A) User