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

Input: Consider Input: 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

Output: Answer: (A) User


Input: Consider Input: Sentence1: Might I suggest the Autumn House. It is a cheaper guesthouse that offers both free parking and free internet. Would you like more info for them? Sentence2: It really doesn't matter. I don't need internet. I just for sure want a 4 star place. Sentence3: Thank you! Can you also get me a train going to Cambridge that day? Sentence4: Sure. There are six different options in that area. What were you looking for as far as price range and amenities? Sentence5: Is there anything else that you need? Sentence6: I need a 4 star hotel in the east, please. Sentence7: I think this is what I needed. Thanks. Sentence8: Sure! I just need to know where you plan on departing from and what time you'd like to leave. Sentence9: Booking was successful. Reference number is : 544D87NG . Sentence10: I need a room for 4 for 4 nights starting on Tuesday. Question: Who has spoken the sentence 3? (A) User (B) System

Output: Answer: (B) System


Input: Consider Input: Sentence1: Okay! Would you like to stay in a guesthouse, or in a hotel? Sentence2: Ali Baba is a Lebanese restaurant in the centre. Would you like for me to book it for you? Sentence3: I am in the mood for Lebanese food. Sentence4: I'm not sure what time I need just yet. Can I get the postcode? Sentence5: How many people will be traveling? Sentence6: Sure. It's cb21nt. What else can I assist you with today? Sentence7: Great. Can you also get me a taxi to take me from Ali Baba to El Shaddai. I want to leave the restaurant by 05:30. Sentence8: Thank you for contacting us at Cambridge TownInfo Centre. Have a good trip. Goodbye. Sentence9: Your reservation for 6 at El Shaddai this Saturday for 6 days 5 nights was successful. Your Reference number is : 6NUZQ2BG . Sentence10: We have over 69 restaurants i the center of town. Do you have any food style or price preference? Sentence11: I just need one taxi. Can you book that for me, please? Sentence12: I'm also in need of a hotel in the same area as the restaurant. Sentence13: No, thank you. That was it for today. Thank you very much for your assistance. Have a good one. Good bye. Sentence14: I need to find a place to eat in the centre, thanks! Sentence15: I have the el shaddai that meets those requirements. Would you like to make reservations? Sentence16: I have booked you a taxi. The contact number is 07167504810, and it will be a black Honda. Anything else for you today? Sentence17: I'm gonna get wild this weekend, find me a zero-star guesthouse with free parking! Sentence18: Definitely! There will be 6 of us, arriving Saturday, and staying for 5 nights. Question: Who has spoken the sentence 17? (A) User (B) System


Output: Answer: (B) System