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

Ex Input:
Sentence1: No, but I would like to find a cheap priced south african restaurant. Sentence2: I'm sorry, but we don't have and South African restaurants in the area. Is there a different type of food I can help you find? Sentence3: I would say let's look for an attraction first. Can you recommend something to do in the south part of town? Sentence4: I will go with whatever you recommend, I just need the attraction type and postcode. Sentence5: Hi, I am looking forward to trying some of your local restaurants. I do need help with some other places to go in town while I am there though. Sentence6: There are several nice parks in the area as well as theaters and museums. Sentence7: The byard art museum postal code is cb21sj. Can i help you get transportation to and from the museum? Sentence8: Try Portuguese then. Sentence9: Thanks so much for putting up with me! You've been great! Sentence10: 3 people will be dining. Please give me a reference number once you finish the reservation Sentence11: I would rather be in the south area. Sentence12: What is your food type preference? Sentence13: There are two results. Both are cheap. Do you prefer the south or centre? Sentence14: I have finished booking it for Thursday at 12:15 for 3 people at Nando, your reference number is TDQZGM38 . Do you need anything else? Sentence15: Can you book a table for me there on Thursday at 12:15? Sentence16: The only option is nandos. Sentence17: You are welcome enjoy Sentence18: How many people are in your party? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: The hotel should be in the moderate price range and should include free wifi. Sentence2: Booking was successful. Reference number is : WJFFGVWD . Is there anything else I can help you with? Sentence3: I've found several hotels in the moderate price range. Is there a specific area of town you're looking to stay in? Sentence4: How about the Acorn Guesthouse? Free wifi and moderate price range. Sentence5: Sure, book me for 2 people for 5 nights starting on Monday? Sentence6: That will be all. good bye. Sentence7: Yes, I'm looking to stay in the north. Sentence8: I am actually looking for a hotel. Is the Acorn Guesthouse listed in that type? Sentence9: No, it is not. How about Ashley hotel? Sentence10: I'm looking for lodgings that are moderately priced. Sentence11: Good bye, enjoy your stay. Sentence12: I've found 11 possibilities for you. Would you prefer a guest house or a traditional hotel? Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: How about 9:45? Sentence2: I need to travel on Friday sometime after 13:45. Can you tell me whats available? Sentence3: I would like to book a train leaving Cambridge that goes to London Liverpool Street please. Sentence4: My apologies, there are none that serve Jamaican. Would you like to look for a different type of cuisine? Sentence5: I was unable to book for that timeslot. Can you give me another timeslot to work with? Sentence6: How about one that serves British food in the same area? Sentence7: I have found several, how about this one? The Oak Bistro, price rang is moderate, phone is 01223323361, post code cb21eg, 6 Lensfield Road. Sentence8: Great that's all the information I needed on the train. Sentence9: You are welcome. Enjoy your stay. Bye. Sentence10: Thank you. That's all I needed. Sentence11: Can you please book for 4 on Friday at 10:45? Sentence12: I have train TR4187 that leaves at 13:59 and arrives by 15:27 in london liverpool street. Would you like me to book that for you? Sentence13: There is a train which leaves every two hours between 5:59 and 13:59 that costs 16.60 pounds. The duration of the trip is 88 minutes. Sentence14: What about one in the centre? Sentence15: I also need to find a restaurant. Preferably one that serves Jamaican food. Can you find that for me? Sentence16: Excellent! Can I help you with anything else today? Sentence17: Your table is reserved. Reference number 66TP23A1 . Sentence18: Unfortunately there aren't any restaurants serving Jamaican food in the area, would you like to try another type of food? Question: Who has spoken the sentence 9? (A) User (B) System

Ex Output:

Answer: (B) System