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

[EX Q]: Sentence1: Can I help you with anything else today? Sentence2: I am looking to get an address and entrance fee for a theatre. Can you search for one for me using the criteria I mentioned earlier? Sentence3: There is no specific area. Sentence4: Entrance fee is not mentioned. There are no restaurants in that area that fit your criteria. Is there something else I can look up for you? Sentence5: Yes, get me a table for 3 at 15:30 on Saturday. Sentence6: Fantastic, have a great day! Sentence7: Is there a entrance fee? I am also looking for a cheap north american restaurant to dine at on the east side. Any recommendations? Sentence8: No that will be all! Thank you! Sentence9: Hi, can you please give me information on theatres in town? Sentence10: The Missing Sock is an international restaurant in the East and has a cheap price range. Would you like a reservation? Sentence11: I have made those reservations and the reference number is Y40MJDC0 . Sentence12: I have 5 theaters located in the centre and south which area would you like? Sentence13: Are there any serving international cuisine in the same area and price range? Sentence14: Great, thanks for your help! Sentence15: I see. What sort of information can I help you with? Sentence16: The address for adc theatre is park street. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I don't have any guesthouses listed in that price range. Would you like something in the moderate price range possibly? Sentence2: Will you be departing from cambridge? Sentence3: Sure I have a train arriving at 14:10 on a Tuesday. Would you like to book a seat? Sentence4: Okay, I made you a reservation at the Acorn Guest House. Check in is Friday for a party of 5 and your reference is CGDK1YT1 . Will that be all today? Sentence5: I just need to know how long the travel time it. Sentence6: Great. That is all. Sentence7: Ok! Have a great day! Sentence8: Sure check moderate for me. Sentence9: TR0743 is leaving cambridge at 13:21 and the cost is 12.80 pounds, how many tickets will you need? Sentence10: Might I recommend the Acorn Guest House? It's a moderately priced, 4-star guesthouse in the north area. Sentence11: Yes please. May I have the departure time, train id, and price? Sentence12: Yes, I will be departing from Cambridge. I also need to leave on Tuesday. Sentence13: I need to find a train that goes to stevenage and arrives by 17:30. Sentence14: I would also like to find an expensive guesthouse. Sentence15: The travel time is 49 minutes. Sentence16: Sounds great, can you please book me for 5 people and 4 nights starting on friday? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: ok thanks and have a great day Sentence2: Oh, ok. I really don't want to stay at a guesthouse though. Can you recommend a hotel instead? Sentence3: alexander bed and breakfast is a guest house in the centre area. Would you like to book a room? Sentence4: Keep the snarky comments to yourself. Sentence5: What is the train schedule from birmingham new street like? I need to arrive at 13:45. Sentence6: It doesn't matter. What do you recommend? Sentence7: I need the travel day to be Sunday. I'll be going to Cambridge and arrive by 13:45. I'll be leaving from Birmingham New street. Sentence8: What is the travel time on that train? Sentence9: I am planning a vacation and really could use some help finding a good place to stay in town. I've never been to Cambridge before. Sentence10: Booking was successful. Reference number is : 36N9VCAD . Is there anything else I can help with? Sentence11: which side of town do you prefer and what is the price range? Sentence12: Yes, thanks very much! Have a great day! Sentence13: You too! Thanks so much for all the help. Please end the convo and read the directions next time. thanks Sentence14: Train TR7468 will arrive at 13:23. Will this work for you? Sentence15: You are quite welcome, thank you for using our services. Have we met all of your needs today? Sentence16: Where would you like the train to arrive, and what time will you be leaving? Sentence17: The Huntingdon Marriott hotel is a very nice place. Sentence18: It is 163 minutes on that train. Sentence19: Sounds good. Can you get me a room for 2 for 5 nights starting Sunday? Sentence20: Excellent. Thanks for all the help! Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]:
Answer: (B) System