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

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
Answer: (B) System

Sentence1: I'll be leaving from Leicester and want to go to Cambridge. Sentence2: Booking was successful, reference number is YN5MH1ZN . Anything else I can help you with? Sentence3: Where are you departing from and what is your destination? Sentence4: I need a hotel in the north that has free parking. Sentence5: There are 11 different hotels. To help narrow it down, can you tell me if there is a price range you prefer? Sentence6: All right. I need a booking for six, please, and the reference number. Sentence7: Yes it is. Sentence8: There are 91 trains leaving Leicaster to Cambridge after the specified time. How does Friday 11:09 sound? Sentence9: No thank you that will be all. Thank you for your help in booking my trip and stay! Sentence10: How about the Acorn guest house on 154 Chesteron Road? It's a moderate price range guesthouse that is rated 4 stars with free parking and wifi. Sentence11: Perfect. I'd like to book a 5 night stay for the six of us. Sentence12: Great. Is this hotel stay also starting on Friday? Sentence13: No problem! You have a wonderful day! Sentence14: I'm looking for a train leaving after 10:30. Sentence15: No not really, I would prefer a guesthouse type of hotel with free wifi though. Sentence16: I was able to book the train for you for 6 people. The reference number is 7QAMUGHQ . Do you need anything else? Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: I have several hotels in your price range with free parking, what area would you like? Sentence2: The earlest I have leaving is train TR7713 at 19:27,will this be okay for you? Sentence3: A guesthouse in the east, please Sentence4: Ok, and where are you heading to? Sentence5: There are nine I recommend allenbell it's a 4 star guesthouse. Would you like the address and phone number or me to book it for you? Sentence6: I am heading to Ely. Sentence7: Oh, not Ely, sorry. I need to leave after 16:00 going to London Liverpool Street. Sentence8: That is good, I also need a place to stay with a cheap price and free parking. Sentence9: I am trying to find when the train is leaving Sunday Cambridge can you help me? Sentence10: What time do you want to arrive by? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User