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

[EX Q]: Sentence1: Thank you for using the Cambridge Town Info Centre Services. I hope you enjoy your time in Cambridge! Sentence2: is it in moderate price range? Sentence3: Do you have anything in the moderate price range? Sentence4: Most of our nightclubs are right in the center of town. Kambar is my favorite. Sentence5: No, thanks. Can you find a gastropub restaurant in the centre, please? Sentence6: it is an expensive gastropub Sentence7: Yes, there's the the cow pizza kitchen and bar. Sentence8: They're located on Corn Exchange Street. Would you like me to make a reservation for you? Sentence9: Awesome! Can you provide me with the address, entrance fee, and postcode, please? Sentence10: The address is 1 wheeler street cb23qb and admission is 5 pounds, would you like their phone number? Sentence11: I am looking for something fun to do while in town. A nightclub would be nice. Sentence12: What is their address? Sentence13: backstreet bistro is an expensive gastropub in the centre area. Would you like more information? Sentence14: No, I just need information for today. You have answered all of my questions. Thanks so much. Bye. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Can you book a table at the Bistro for me? 4 people at 13:30 on Sunday, please. Sentence2: I am looking for a place to eat that's expensive and serves Belgian food. Sentence3: I just need the arrival time and price. Sentence4: I have two, the backstreet bistro and the slug and lettuce. Do you have a preference between the two? Sentence5: Yes, what time do I need to be at the station? Sentence6: How about somewhere expensive in the centre? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : NSLKEI1G . Sentence8: I want to leave after 10:30 on Monday. Sentence9: The TR8089 meets your criteria. Would you like to book tickets? Sentence10: You're welcome, have a good day. Sentence11: no such restraunts too Sentence12: Thanks! I also need a train from Cambridge to Ely, please. Sentence13: what time will you be departing? Sentence14: I should be asking you what time you need to be at the station. Sentence15: The arrival time for train TR8089 is 12:07, and it will cost only 4.40 pounds. Is there anything else I can help with? Sentence16: I'm sorry, we don't have any Belgian restaurants. Would you like to try a different type? Sentence17: That was everything. Thanks very much! Sentence18: How about a gastropub restaurant? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No, that's okay. Are there any Museums in the East instead? Sentence2: I can recommend four different museums in the east area. How about Cambridge artworks? It is popular. Sentence3: You're welcome, have a great day! Sentence4: Nope, that's everything. Thank you! Sentence5: Well, unfortunately there are architectural attractions located in the east. Would you like to try a different area? Sentence6: Can you give me their phone number and postcode, please? Sentence7: The cambridge artworks is a free museum. Can I help you with anything else today? Sentence8: Excellent. I'm also looking for a train as well. Sentence9: Yes, I am looking to depart from London Kings Cross that should arrive in Cambridge by 15:00 and I need it for 3 people and will need the reference number. Sentence10: On Monday please. Sentence11: I was able to book you on TR3194 which leaves london kings cross at 13:17 and arrives Cambridge at 14:08. Reference R6KWX99C . Can I help with anything else? Sentence12: I need to narrow the search down. What day will you be traveling? Sentence13: That sounds interesting. What is the entrance fee for this museum? Sentence14: Certainly. Do you have a destination in mind? Sentence15: I am looking for architectural spots to visit on my trip to Cambridge. On the east side. Sentence16: Absolutely. Their phone number is 01223902168 and they are in postcode cb13ef. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]:
Answer: (B) System