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

Q: Sentence1: I'll be leaving from Leicester and want to go to Cambridge. Sentence2: Booking was successful, reference number is YN5MH1ZN . Anything else I can help you with? Sentence3: Where are you departing from and what is your destination? Sentence4: I need a hotel in the north that has free parking. Sentence5: There are 11 different hotels. To help narrow it down, can you tell me if there is a price range you prefer? Sentence6: All right. I need a booking for six, please, and the reference number. Sentence7: Yes it is. Sentence8: There are 91 trains leaving Leicaster to Cambridge after the specified time. How does Friday 11:09 sound? Sentence9: No thank you that will be all. Thank you for your help in booking my trip and stay! Sentence10: How about the Acorn guest house on 154 Chesteron Road? It's a moderate price range guesthouse that is rated 4 stars with free parking and wifi. Sentence11: Perfect. I'd like to book a 5 night stay for the six of us. Sentence12: Great. Is this hotel stay also starting on Friday? Sentence13: No problem! You have a wonderful day! Sentence14: I'm looking for a train leaving after 10:30. Sentence15: No not really, I would prefer a guesthouse type of hotel with free wifi though. Sentence16: I was able to book the train for you for 6 people. The reference number is 7QAMUGHQ . Do you need anything else? Question: Who has spoken the sentence 15? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: Hi, I am looking for a place to swim at in cambridge. Sentence2: The Yippee Noodle Bar is moderately priced. Would you like me to book you a table? Sentence3: That is all I need. Thank you. Sentence4: Thanks, also in the centre of Cambridge, could you find me an asian oriental place to dine? Sentence5: There are 4 options for asian oriental which range from cheap to expensive. Do you have a preference? Sentence6: May I have their phone numbers and the entrance fee for the pools. Sentence7: Unfortunately it is not available at that time or party size. Sentence8: I prefer moderate cost Sentence9: There are four, including parkside pools located in the centre. Sentence10: The number for parkside pools is 01223446100. You will need to call them to see if there is an entrance fee. Sentence11: You now have a 16:45 reservation for 7 at Yippee Noodle Bar. Your reference number is BOZ3MSRO . Sentence12: Let's try 16:45 then. Sentence13: You are very welcome. Goodbye. Sentence14: Yes I would like to book a table for 7 on Monday at 17:45 Question: Who has spoken the sentence 10? (A) User (B) System

A: Answer: (A) User
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Q: Sentence1: I can do the j restaurant in the centre if that would be ok Sentence2: Okay, the river bar steakhouse and grill can be booked at 9:00 on Sunday, I've booked for 5 people, the reference number is RFTEXMIX, is there anything else I can help with today? Sentence3: They are not open at 9:00 on sunday. May I suggest another establishment? Sentence4: Unfortunately booking at that time was unsuccessful, do you have an alternate time you'd prefer? Sentence5: Sure we can try to book that. Sentence6: I am sorry but on Sunday cheap restaurants in the centre are all completely booked. Is there something else I can help you with? Sentence7: Sounds great, I'd like to book for the same number of people at 10:00 on the same day. Sentence8: I need to leave after 18:45, not the time I said before. Sentence9: Centre area, no food type preference, what do you recommend? Sentence10: Please try 9:00 instead on the same day. Sentence11: Yes, I am also looking for a cheap place to dine. Sentence12: I am certain. Their phone number is 01223363471, perhaps you can call and speak with someone. Sentence13: I have five options for your requested time with the closest leaving at 19:21. Would you like to make a reservation? Sentence14: Please recommend the cheapest restaurant that is available and book it. We need to eat! Thanks!!! Sentence15: No, thank you. You were very helpful. Sentence16: That doesn't seem to be working either. Sentence17: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence18: You're welcome. Is there anything else needed? Sentence19: Are you quite certain you can't get me a table at 9:00? Sentence20: I've got several choices for cheap dining. Do you have a preference of area or food type? Sentence21: I have several options. How about the Dojo noodle bar? It's located at 40210 Millers Yard City Centre. Sentence22: Actually, book that for me. Same number of people on the same day. Sentence23: thank you I will call them Sentence24: Can you please locate another restaurant for me please that is accepting reservations on sunday. Sentence25: I am looking to book a train. Sentence26: I would be more than happy to help you find a train. Can you tell me where you will be departing from and where you would like to go? Sentence27: Yes please. Book it for 5 people. What is the reference number? Sentence28: It appears to be booked up all day sunday. Can I recommend another restaurant that might be open that day? Sentence29: I'm looking for a train that goes to leicester and arrives on sunday. The train needs to leave after 6:45 from cambridge. Sentence30: Your reference number is P5XAHU9D . Is there anything else I can help you with? Sentence31: Yes please do I am having no luck, I need the reference number then too. Sentence32: Is there a time you need to arrive by? Question: Who has spoken the sentence 16? (A) User (B) System

A:
Answer: (A) User
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