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: Then you are all set? Sentence2: I booked you a black volvo. The driver can be reached at 07410117478. Is there anything else I can help you with today? Sentence3: I'm sorry, I clearly wasn't paying attention. Yes that is all I need. Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 0IJIWWQ9 . What else can I help you with? Sentence5: We have five hotels that meet that criteria, are you looking for a specific part of town? Sentence6: Yes. Have a great day. Sentence7: Anything in the centre would be fine, whatever you recommend. Sentence8: Regretfully, I don't have a listing for Venetian cuisine. Do you have a second choice? Sentence9: I'm looking for a place that has 3 stars and free parking. Sentence10: There are over a hundred restaurants to chose from do you have a price range? Sentence11: Does that one have free internet as well? If so it will work great for me. Sentence12: Yes I can. What type of place to stay would you like? What area of town? Sentence13: Yes the hamilton lodge is 3 stars moderately priced and offers free wifi and parking. Sentence14: There are 4 results. restaurant one seven, the oak bistro, the copper kettle, and cotto. Would you like more information on any of those? Sentence15: Sadly, I don't have access to that information. The Oak Bistro might be a good choice. Their phone number is 01223323361 if you'd like to call them Sentence16: Thanks, I need a taxi to commute between the two places. Sentence17: I am not looking for a specific area, but I would like for it to be in the moderate price range, please. Sentence18: Definitely something moderately priced. If you can't find Venetian, how about British? Sentence19: Thank you for calling. Sentence20: I'm looking for a restaurant that serves venetian food. Sentence21: Yes, please. Find out which of the four restaurants have vegan options, please? Sentence22: How about the hamilton lodge it's located in the north. Sentence23: I am traveling between the two places discussed, I need to reach the restaurant by the booked time. Sentence24: I can help you book a taxi but first I need some information - where are you leaving from and what's the destination. Also what time do you want to leave? Sentence25: I also need a place to stay. Can you help with that? Sentence26: Okay, well, let's go ahead and book a table for one at 11:30 on Tuesday. Question: Who has spoken the sentence 18? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Alright. Enjoy your stay in Cambridge! Sentence2: Thank you. Have a great day. Sentence3: The train that arrives closest to 16:45 is best. I just need to know what time it leaves and arrives. Oh and of course it's ID. Sentence4: Yes. I am looking for a place to go in the west part of town. With preference to college. Sentence5: There are 6 days that arrive before 16:45 on this day. Did you have any other preferences? Sentence6: I am looking for information in Cambridge. I need a train ticket. Can you help? Sentence7: In the west part of town Clare College. The entrance fee is 2.50 pounds. Sentence8: Great that's all the information I need! Sentence9: Certainly. What is your departure location and your arrival location? Sentence10: It has been my pleasure. Feel free to contact us with any other questions you may have in the future. Sentence11: I would like to depart from London Liverpool Street and arrive in Cambridge. I would like to leave Sunday and arrive by 16:45? Sentence12: Of course! That will be TR6578 leaving at 13:39 and arriving at 15:07. The price is 13.28 pounds and it's an 88 minute duration. May I help with anything else? Question: Who has spoken the sentence 5? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: Yes thanks, that will be all. Sentence2: There are 7 guesthouses available in the north that are moderately prices and four stars. Would you like to book one of these rooms? Sentence3: We have 11 places to stay in the north. Do you prefer a guesthouse or hotel? And do you need internet or parking? Sentence4: Can I have their phone number, please? Sentence5: I'd prefer a guesthouse. A 4 star one, if possible. Sentence6: Sure, it is 01223300552 Sentence7: Do any have both free parking and internet? If so, I'll need their phone number. Sentence8: I need a train going to Cambridge that'll leave after 12:15. Sentence9: what day of the week do you want to travel Sentence10: The limehouse meets your needs including internet and wifi, shall I book you or provide more info? Sentence11: The TR3257 leaves at 13:39 for 16.60 pounds. Would you like me to book that for you? Sentence12: The train is number TR3257. It arrives in cambridge at 15:07. How many tickets would you like? Sentence13: Yes. Also, what will be the arrival time? And, what is the train ID? Thanks so much! Sentence14: It was a pleasure to help today. Have a good afternoon. Bye. Sentence15: No, that is all I need. Thank you! Sentence16: i am, Also looking for a place to stay. The hotel should be in the north and should be in the moderate price range Sentence17: Thank you for using our services. Have we met all of your needs today? Sentence18: Trusday, I need to leave by the london liverpool street station. Question: Who has spoken the sentence 3? (A) User (B) System
Output: Answer: (B) System