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'm sorry, but there are no restaurants that meet your criteria. Would you like to broaden your search? Sentence2: There are 5 places that serve European. Did you prefer modern European, or just European food in general? Sentence3: Yes, please. I will need 8 tickets, and please give me the reference number once you book. Sentence4: What about a restaurant that serves european food? I'd like the phone no. and postcode to that, please. Sentence5: Sounds lovely. Thank you so much for all of your help! Sentence6: How about the Galleria? Their phone number is 01223362054 and the address is 33 Bridge Street, the postcode is cb21uw Sentence7: What time do you want to depart? Sentence8: I also need a Thai restaurant in the moderate price range. Sentence9: There is only one train that would meet your criteria closely and it leaves at 11:50 and arrives in Ely at 12:07. may I book that for you? Sentence10: I have successfully booked you 8 tickets. Your reference number is 0YY5WZQ6 . Is there anything else you need? Sentence11: First, may I confirm that your departure site is Cambridge? Sentence12: Just european food in general, please. Sentence13: hi I want a train to Ely arrived by 13:45, can you help me do that? Sentence14: Thank you for using this system. Sentence15: That is correct. Sentence16: Any time is fine as long as it's on Saturday. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You're welcome, glad I could help. Sentence2: I personally like Parkside Pools. It's in the center of town, on Gonville Place. Sentence3: Any area is fine. Which of the 4 swimming pools do you suggest? Sentence4: It is cb11ly. Is there anything else I can help you with? Sentence5: Where will you be departing from? Sentence6: Thanks. That was all I needed. Goodbye. Sentence7: I am departing from Cambridge. Sentence8: I am looking for information on places to go in Cambridge. Can you help with that? Sentence9: My destination is london kings cross Sentence10: Can I get the postcode as well? Sentence11: I can help with that. Is there a particular area you're interested in? Sentence12: Yes, there are 4 swimming pools that match those requirements. Is there a particular area you would like to go to? Sentence13: There are 278 trains that meet that criteria. Would you like to narrow down your options by departure site, destination, or arrival time? Sentence14: I have made that reservation and your reference number is 1702SDBO . Sentence15: TR1502 arrives in london kings cross friday at 11:51. Would you like me to book you any seats? Sentence16: I also need a train leaving after 11:00 on friday Sentence17: What I'd really like is to find a swimmingpool. Sentence18: Yes book for 8 people and I need a reference number Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: rosa's bed and breakfast Sentence2: Is it a type of guesthouse and is it in the south? Sentence3: yes I found it and it was great Sentence4: You're welcome. Have a good day. Sentence5: Thank you for the reference number, how about the sri lankan restaurant in the south? Any luck finding one? Sentence6: That sounds good. Can you book it for 3 people to stay 5 nights on tuesday? Sentence7: Nah, I'd like to stay in the same area as the hotel. Let's try a Portuguese restaurant instead. Sentence8: I apologize but there are no Sri Lankan restaurants in south Cambridge. Would like to explore another area? Sentence9: Can I also get a taxi from the hotel to the restaurant? I'd like to leave the hotel by 5:30, please. Sentence10: Rosa's bed and breakfast on 53 roseford road is inexpensive and has a 4 star rating. Would you like me to make a reservation for you? Sentence11: The reference number is 7AAVA5YO Sentence12: Yes, sir, we have the booking all completed for you. That was Five days starting Tuesday, for three people. Is that correct? Sentence13: Yes I got you a taxi. It is a grey Volkswagen whose contact number is 07956461934. Sentence14: Hi, I'm planning a visit to the south of Cambridge and am looking for a bed and breakfast. Sentence15: Absolutely. The postcode is cb17dy, the address is at Cambridge Leisure Park in Clifton Way, and the phone number is 01223327908. Sentence16: Sounds great. Thanks for your help. Sentence17: No but could I get the postcode, address and phone number please? Sentence18: You're in luck. We do indeed have a Portuguese restaurant in that area. The name is Nandos. Would you like a reservation? Sentence19: Yes, but I do need the reference number, please. I'm also looking for a sri lankan restaurant in the south. Sentence20: I'm sorry there are no results for a sri lankan restaurant in the south. Would you like to change some criteria, such as area or cuisine? Question: Who has spoken the sentence 10? (A) User (B) System
Example Output:
Answer: (A) User