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

Sentence1: Sorry. TR2052 departs from leicester and the destination is cambridge. It leaves at 15:09 on Wednesday. Would you like me to book it for you? Sentence2: Yes, I only need 1 ticket for myself. Sentence3: There are 13. I could recommend Trinity College on Trinity Street. Or would you like information about one of the others? Sentence4: I would like to arrive by 17:00 in leicester. Sentence5: I would like help finding a college to visit in the centre of town. Sentence6: Of course. The address is Trinity Street, postcode is CB21TQ, and the entrance fee is one pound. Can I help you with anything else? Sentence7: Yes and please give me the reference number. Sentence8: OK, I've booked one ticket for you on TR0451 from cambridge to leicester, arriving at 16:06. Ref# 8OZNJHMO . Can I help you with anything else today? Sentence9: That sounds good. Could you give me the entrance fee, phone number, and postcode? Sentence10: Certainly. Just to verify, are you traveling alone? You would only like one ticket? Sentence11: TR3702 LEAVES AT 05:00 CAN I BOOK THAT ONE FOR YOU? Sentence12: How early do you wish to arrive? There are 11 trains that will get you there before 17:00. Sentence13: Thank you for using our service. Have a good night. Goodbye. Sentence14: Does this train go to Leicester from Cambridge? Sentence15: Yes I'm also looking for a train that leaves wednesday and arrives by 17:00. Sentence16: I think that is all I need, thank you. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: No, surprise me. I will need the address and the area, though. Sentence2: I'll need one from leicester to cambridge on saturday, leaving after 16:30 Sentence3: No thanks, that will be all. Sentence4: Is there anything else I can help you with today? Sentence5: I don't need a reservation, I just need the address and the area. Sentence6: Alright. Thanks for using our service and have a nice day. Goodbye. Sentence7: It is the centre area and its address is Free School Lane City Centre Sentence8: Good afternoon! I'd like to visit an expensive european restaurant. Will you help me find one? Sentence9: Okay. Thank you. Sentence10: The train arrives at 18:54 and costs 30.24 pounds. Sentence11: Eraina is a very nice restaurant in the centre. How many in your party? And what day and time should I make your reservation for? Sentence12: What time does it arrive and the price? Sentence13: Where would you like to depart and arrive? Sentence14: Yes there are 5 restaurants that meet your requirements. Do you have a part of town or type of food you prefer? Sentence15: Great,I also need information on getting a train. Sentence16: I have a train for you that leaves at 17:09. Would you like me to book it? Question: Who has spoken the sentence 14? (A) User (B) System
Answer: (A) User

Sentence1: No, I think that's all that I'm looking for. Thank you very much for the help. Sentence2: no, just the postcode Sentence3: That should be fine, can you book that on thursday to cambridge? Sentence4: Sure, the postcode of the Scott Polar Museum is cb21er. Is there anything else I can help you with today? Sentence5: hi am looking for a train leaving broxbourne at 11:00. Sentence6: There are no trains leaving at exactly 11:00. Is a train leaving Friday at 11:32 okay? Sentence7: You're welcome. Enjoy your time! Sentence8: One ticket, please. Sentence9: Thank you so much for the assistance! Sentence10: Excellent. I hope you have a great time! Sentence11: The price of the ticket is 17.90 pounds, shall I book it for you now? Sentence12: Okay you're all set for your train ticket. Also the Scott Polar Museum is free! Would you like their address or phone number? Sentence13: Yes, I can. How many tickets do you require? Sentence14: Yes, please. I'm also looking a ticket to the Scott Polar Museum Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User