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

[EX Q]: Sentence1: You're welcome, have a great day. Sentence2: I would like modern european food and in should be located in the centre of town. Sentence3: I would like a train that leaves from stansted airport after 16:15 Sentence4: I'd like a cheap one, I don't want to spend too much on food, I want to bring back as many knick-knacks as possible. Sentence5: Please get me their postcode instead Sentence6: How many tickets do you need me to book for the train? Sentence7: I actually don't need a ticket right now. Could you please tell me the price and travel time though? Sentence8: There are 8 results for European restaurants in the centre area, would you prefer an expensive, moderate or cheap price range? Sentence9: Yes, the postcode is cb58aq. Sentence10: The river bar steakhouse and grill meets all your needs. Do you want me to book? If yes, for how many, what day and what time? Sentence11: Absolutely. The TR5365 costs 10.10 pounds and has a travel time of 28 minutes. What else can I do for you? Sentence12: There's a train leaving stansted airport for cambridge every hour on Monday, by what time would you like to arrive? Sentence13: I will be traveling on monday and need to go to cambridge Sentence14: The earliest train is TR5365 that leaves the airport at 16:24 and arrive in Cambridge at 16:52. Do you need a ticket? Sentence15: Thank you, that will be all. Sentence16: I don't care. Give me the earliest one leaving after 16:15. Sentence17: What are would you like to eat? Sentence18: Yes please thank you. Can you also assist to find me a restaurant where i can dine in the Center. My preference is Modern European food. Sentence19: I also need a place to eat. Sentence20: What day will you be traveling, and where will you be heading to? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Yes. I will be staying 5 nights starting Friday. Sentence2: Im also looking for the cow pizza kitchen and bar. Whats the address for it? Sentence3: its address is Corn Exchange Street. what else can i do for you? Sentence4: Oh, expensive please. I do hope it is a guesthouse? Sentence5: You have helped me with everything I need. Thank you. Sentence6: Anytime. Enjoy your visit. Sentence7: I'll be staying for 5 nights. Sentence8: Unfortunately they are both hotels. Sentence9: Booking was successful. Reference number is : GQPN80PK . Is there anything else I can assist you with today? Sentence10: Okay I've got three options here. Would you like a cheap or an expensive price range? Sentence11: Can you help me locate a hotel to stay at that has free parking and a 4 star rating? Sentence12: Oh. I would really prefer a guesthouse. How about the moderate price range? Sentence13: Okay, I recommend The Acorn Guesthouse. Would you like me to book there? Sentence14: NO problem. How long are you staying? Sentence15: The location isn't important. I need to book it for Friday, please. Sentence16: They are moderate, it is a gastropub, in case you need them, the postal is cb23qf and the phone number is 01223308871, can I assist with anything else? Sentence17: I have 9 guesthouses in the moderate price range, do you have a location preference? Sentence18: I need it's price range please Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I will be leaving from Broxbourne. Sentence2: That works, can you book seats for 4 on that and give me the reference number? Sentence3: Cambridge contemporary art is very edgy. The address is 6 trinity street, postcode cb21su, and it is free. Do you need more information? Sentence4: There is a 09:32 that would arrive by 10:32 for 17.90 pounds. Does that sound good? There are other options if you'd like to leave later. Sentence5: We have lots of museums, architecture, and colleges. What would you be most interested in? Sentence6: My first choice, actually, is not a museum, but an entertainment attraction. What type of entertainment attractions are available? Sentence7: There are 11 museum in the city centre. Is there a particular type of museum you're interested in? Art? Science? Sentence8: I would like a museum. Sentence9: Booking was successful, the total fee is 71.59 GBP payable at the station . Reference number is : BIBTGCNA . is there anything else i can help you with? Sentence10: You know, on second thought a museum may be fun. Could you search listings for a museum in the centre? Sentence11: Do you have any suggestions for entertainment that are in town center? Sentence12: We don't have any in centre. Maybe a different part of town? Sentence13: No thank you that is all I needed today. Sentence14: Where will you be leaving from? Sentence15: There are 11 in the centre is there a type of museum you'd like to visit? There are many art galleries and some science museums. Sentence16: Enjoy your visit! Let us know if we can be of any more assistance. Sentence17: Hey planning on coming out there. Please suggest a train that would arrive in cambridge at 12:30! Sentence18: Art sounds good. Let's try that. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System