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

[Q]: Sentence1: It looks like there are hourly trains starting at 5:09. Did you have a particular day and time in mind? Sentence2: Thanks for the help. Sentence3: Will you train arriving at 07:54 work ok for you? Sentence4: Yes I need it booked for 2 people please. Sentence5: Unfortunately, there are no other Italian restaurants in the east. Would you like me to find you one in another area? Sentence6: Is the pizza hut in the moderate price range? Sentence7: I've successfully booked 2 tickets for you, the reference number is 9FE8N16G . Sentence8: I am looking for an Italian restaurant in the east. Sentence9: Pizza hut fen ditton matches your description. Sentence10: I guess it'll have to do. Can you book us a table for 2 on Wednesday at 14:00 please? Sentence11: Uh, no pizza hut's please. Something more classy please. Sentence12: Absolutely! To start, let me get more details. What are your desired departure and arrival cities? Sentence13: Thanks so much! Can you help me with train tickets too? Sentence14: Yes, it is. Should I book it for you? Sentence15: Yes, I'd like to book the train for Wednesday and I want to arrive in Cambridge by 08:30. Sentence16: Booking was successful. The table will be reserved for 15 minutes.Reference number is : H4BTTI6P . Sentence17: The train should go to cambridge and should depart from leicester. Sentence18: Have a great day! Question: Who has spoken the sentence 7? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Would you like British food? Sentence2: Where are you going or coming from? Sentence3: I will be leaving Cambridge and heading to Ely. Sentence4: The TR8399 leaves from Cambridge on Monday at 09:50. Shall I book that for you? Sentence5: Oh that's great. That would be all, thank you. Sentence6: Sure, that works for me. I need the phone number, postcode, and address for the restaurant. Sentence7: Is there a certain time you need to arrive by? Sentence8: I am looking for a restaurant. The restaurant should be in the centre and should be in the moderate price range. Sentence9: You have 2 seats reserved, and you'll pay 8.8 GBP at the station. Your reference number is 90RLYZKX . Can I help you with anything else? Sentence10: I don't have a food preference. Sentence11: yes, for 2 people. Please give me the reference number. Sentence12: I just need to leave after 08:45 Sentence13: Cotto is a great british restaurant located on 183 East Road City Centre. Their postcode is cb11bg and phone number is 01223302010. Is there anything else you need? Sentence14: Please find me a train that leaves on Monday after 08:45 Sentence15: There are 21 restaurants in the centre. Do you have a certain type of food you'd prefer? Sentence16: Thank you for using our service today. Question: Who has spoken the sentence 13? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: I have no preference. Please make a recommendation and book a room for me. Sentence2: I would prefer it to include both. Thanks for asking. Sentence3: Do you have a particular attraction or type of attraction in mind? We have boats, colleges, and a great deal of architecture. Sentence4: Okay I recommend the acorn guesthouse. Is it okay to book there? Sentence5: The phone number is 01223295264 and the address is 23 high street, fen ditton. What else can I do for you? Sentence6: No thank you that is all. Sentence7: Okay what area would you like to stay in? Sentence8: I would recommend the Lynne Strover Gallery. Admission is free. Sentence9: I need the reference number too. I am not particular as to where, as long as it is near Cambridge. Sentence10: There are over a dozen to choose from. Are you looking for a particular star rating? Do you prefer a guesthouse or a hotel? Sentence11: Is parking and free wifi important to you? Sentence12: plese get me the phone number and address Sentence13: Your welcome, enjoy your stay in Cambridge. Sentence14: Okay! I have booked you and your reference number is 5X4PO32W . Sentence15: If the acorn guesthouse is in the moderate range with wifi and parking, please book the above nights for me, please. Sentence16: Can I look up anything else for you? Sentence17: Thanks, take care. Sentence18: Please focus your search to the west. Sentence19: Could you help me with some information about places I can go in town? Sentence20: Yes I need a place to stay that is a hotel that is moderate and I need it for 5 nights for 1 person from Tuesday. Sentence21: I have several museums available. What part of town would you like? Sentence22: I want to go to a museum. Question: Who has spoken the sentence 15? (A) User (B) System
[A]:
Answer: (B) System