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

[Q]: Sentence1: What is your departure point? Sentence2: What time do you need to leave by? Sentence3: I am looking for a train to cambridge. I would like something on sunday to arrive by 18:30 Sentence4: I just want to get there at or shortly before 18:30. Sentence5: I'd like to recommend whipple museum of the history of science, at free school lane. Admission is free. Sentence6: Yes it is their full address and the postcode is cb23rh and their telephone number is 01223330906. May I help you with anything else today? Sentence7: Thank you. That is all that I need. Sentence8: i place want a place to go in the centre Sentence9: I found the perfect train! TR7771 will get you there at 18:24. Would you like me to book this for you? Sentence10: Ok, your booking is complete for 6 people. The cost is 79.19 GBP, payable at the station. The reference number is 8W0OSFM6 . Sentence11: I would like a museum in the centre please. Sentence12: What are you into? Do you like theatre? Museums? We have plenty of attractions in the centre and if you tell me what you enjoy I can recommend one Sentence13: My departure will be from Cambridge. Sentence14: Okay. Glad I could be of help. Sentence15: Is that the full address for the museum? Free School Lane? Sentence16: I need to go to Peterborough. Sentence17: Yes, please book me for 6 people. My birdwatching club is taking a trip together. Sentence18: And what is your destination city? Question: Who has spoken the sentence 6? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Yes, after 8:30 would be best. Sentence2: I have booked you a train ride on TR6488 which will depart at 09:21 and will arrive at 10:10. The total fee will be 10:24GBP. Would you like the reference number? Sentence3: No thank you. Thanks for your help. Sentence4: Great, thank you. That's all I needed. Sentence5: What is the total travel time? Sentence6: The post code is cb21ab and the phone number is 01223323737. Where would you like to book a train to? Sentence7: Where are you departing from? Sentence8: I would like the post code and phone number for the restaurant please, and I would like to book a train. Sentence9: The total travel time will be 49 minutes. Sentence10: You're welcome. Is there anything else I can do for you today? Sentence11: I'm leaving from Cambridge. Sentence12: I think something cheap. If not, go up to moderate. Sentence13: Do you have a time in mind? Sentence14: Good day to you. Sentence15: I suggest pizza hut city centre, it has a cheap price range. Would you like me to book it or would you like more information? Sentence16: Yes, Please book the reservation. Sentence17: I need to go to Stevenage on Sunday. Sentence18: I'd be happy to book a table for you. Please let me know the day, time, and the number of people in your party. Sentence19: There are nine of them. What price range do you prefer? Sentence20: I am looking for an Italian restaurant located in the centre of Cambridge. Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: I don't really care. Sentence2: The postcode for the Ballare is cb23na. Would you like any other information? Sentence3: I am looking for an Italian restaurant in the centre of town. Sentence4: You are welcome. Have a marvelous time in Cambridge. Thank you for reaching out to Cambridge TownInfo centre. Goodbye. Sentence5: Great. Can I get the information about one of them? Sentence6: Booking was successful. The table will be reserved for 15 minutes. Reference number is : DL0PXR9G . May I help with anything else ? Sentence7: that is it for today thanks. Sentence8: Can you tell me if you happen to have any nightclubs in town? Sentence9: Absolutely. What price range are you looking for? Sentence10: For the reservation of the taxi, can you tell me your pickup and drop off locations? Sentence11: I'm sorry, there's someone talking here and getting me turned around. I'd like a taxi from the nightclub to the restaurant, early enough to make my reservation. Sentence12: You want a train from Ely to Cambridge, is this right? I also need a travel date and departure or arrival time. Sentence13: i have booked a yellow volvo with contact 07259480629 Sentence14: Sure the Ballare costs 5 pounds to get in and is located in the center at Heidelberg Gardens, Lion Yard. Sentence15: I also need a taxi. Sentence16: stazione restaurant and coffee bar is an italian restaurant in the centre area. would you like me to make you a reservation? Sentence17: Yes please, four people on tuesday at 18:00 Sentence18: What is the postcode for that one? Sentence19: Yes Ely to Cambridge please. Thanks Sentence20: yes we have 5 all in the centre of town. Question: Who has spoken the sentence 19? (A) User (B) System
[A]:
Answer: (B) System