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

[EX Q]: Sentence1: I would like it to serve food from the americas. Sentence2: 'Hotel du vin and bistro' and 'galleria' Sentence3: Certainly, can I book your table at hotel du vin and bistro or would you prefer a table at galleria? Sentence4: i have booked you a taxi, red tesla, phone number is 718 850 4433. Sentence5: Thank you have a great day. Sentence6: Do they offer free parking? And can I get the phone number for them please. Sentence7: There are 2. Did you want me to book one of them? Sentence8: Your table has been booked and is reserved for 15 minutes, reference number is M32YYIJN . Can I help you with anything else? Sentence9: Yes, there is free parking at Hamilton Lodge. The phone number is 01223365664. Sentence10: How about european food? Sentence11: Is it possible to arrange a taxi to take me from the hotel to the restaurant by 16:00? Sentence12: I have the information pulled up. What would you like to know about it? Sentence13: I need to book a table for 3 people at 16:00 on friday at galleria Sentence14: I would like to book a table for three on Friday, at 16:00. Sentence15: I'm also looking for a hotel called hamilton lodge. Sentence16: There are many moderately priced restaurants that meet your criteria, what type of food are you looking for? Sentence17: What are the names? Sentence18: Thank you that's all that I needed Sentence19: I am looking for a restaurant in the moderate price range in the centre of town. Sentence20: Unfortunately I could not find any restaurants serving food from the Americas in the moderate price range. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: 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
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I'm sorry not hotels, guesthouses please. Sentence2: Honestly, I would prefer if you could suggest one as long as its moderately priced. Sentence3: I have many listings,could I get what star rating to would preferred? Sentence4: That's all I needed. Thank you. Sentence5: I am unable to book during that time slot on Thursday. Would you like to try a different time on Thursday or maybe a different day? Sentence6: The india house is in the expensive price range and located at 31 Newnham Road Newnham. Sentence7: Thanks. Could you reserve a table for 3 people at 16:30 on Thursday? Sentence8: Booking was successful. You will arrive at the India House by 15:30. Sentence9: How about 15:30? Sentence10: Yes, actually. I'll be needing a taxi between those two locations. Please make sure they can have me at the restaurant by my reservation time. Sentence11: There are no guesthouses in the expensive range in the north area. There are five options, in the moderate range, any other preferences? Sentence12: You're welcome. Have a nice day. Sentence13: That would be fine. Could you also find out some information about the india house restaurant? Sentence14: I'm sorry, but there are no expensive hotels in the north area. Could I check for one in the moderate price range for you? Sentence15: Alright. Does the acorn guest house sound okay? It's 4 stars with free internet and parking. Sentence16: Yes, please check one in the moderate range. Sentence17: Booking was successful. Your Reference number is : SP0ZTZU8 . Is there anything else I can help you with today? Sentence18: Hello, I'm looking for a hotel in the north, and I'd like the more expensive range please. Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]:
Answer: (A) User