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

[EX Q]: Sentence1: How about an expensive restaurant that serves British food? Sentence2: Cineworld sounds perfect. What's their postal code? Sentence3: The postal code is cb17dy. Can I get you anything else? Sentence4: There are six expensive British restaurants in Cambridge. Do you have a preferred section of town? Sentence5: Have a good time! Sentence6: It's all new to me. Could you recommend one? Sentence7: Sure thing, we have the cineworld cinema located at Cambridge leisure park, Clifton way. Sentence8: Absolutely, I recommend the Cambridge Chop House at 1 Kings Parade in the centre of town. This is a highly recommended British experience by locals and tourists a-like. Sentence9: No, that'll be all. Thank you for all of your help today. Sentence10: I am sorry but there are no restaurants matching your requests. Would you like me to search for a different food type? Sentence11: Great. Could you also help me find a cinema in the south of town? Sentence12: Hello, I am trying to locate a restaurant that serves northern European food, and I would prefer a more elegant setting. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Nothing in particular. Any recommendations? Sentence2: Yes, please coming in on monday for 5 nights for 3 people. Sentence3: We have amazing various of attractions in the centre area! What type of attraction are you looking for? Sentence4: I booked it for you. Your reference number is as follows: 5MM5C3UC . Is there anything else I can assist you with today? Sentence5: Any area is fine are there any with a 3 star rating? I don't need free parking or internet. Sentence6: Let me suggest the Museum of Archaeology and Anthropology. Their admission is free and the phone number is 01223333516. Sentence7: Would you like me to book it for you? Sentence8: Happy to help! Have a good trip! Sentence9: I have many moderate priced hotels available. What part of town would you prefer? Sentence10: alpha-milton guest house is in the north. Would you like me to book you a room? Sentence11: Can you book it for me and get a reference number ? Sentence12: i need a good place to go in the centre Sentence13: That will be all, thanks! Sentence14: I also need a moderate priced place to stay. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: That would be just fine. Can you make reservations for 5 people at 18:00 on wednesday. Sentence2: I was able to book your table for your per your request. The Reference number is : UZ2TEM53 . Is there anything else you need? Sentence3: I am also looking for a train to Cambridge Sentence4: You're very welcome! Have a great day! Sentence5: Yes thats perfect book that for the same group of people please. Sentence6: Thanks for all your help! Goodbye! Sentence7: I'll be traveling from Ely to Cambridge on Wednesday. I need to get to Cambridge before noon. Sentence8: perfect. i have booked and the reference number is WMH7ZZ71 .is there anything else i can help? Sentence9: Can you check for Chinese? I haven't had Chinese in awhile. Sentence10: I'm sorry I have no steakhouses that are moderately priced. is there any other cuisine you might like to try? Sentence11: I have 3 moderately priced Chinese restaurants. I would recommend the Jinling Noodle Bar. Sentence12: thank you that will be all,that was a big help too Sentence13: What sort of moderately priced restaurants does Cambridge offer? I'm only interested in restaurants located in the Centre. Sentence14: Okay, how about TR2006? It leaves ely at 11:35 and arrives in cambridge at 11:52. Sentence15: Thank you. That is all that I need. Sentence16: Sure, where will you be departing from? Also what date and time were you looking to travel? Sentence17: I am looking to eat at a steakhouse. Sentence18: There are quite a few including British,Asian,Italian and many more. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]:
Answer: (B) System