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

Ex Input:
Sentence1: That should do. I am also looking for a place to dine. The restaurant should serve Chinese food and should be in the expensive price range Sentence2: Can you help me find an interesting place to visit on the east side of town? Sentence3: Sure do, know of any interesting ones on the east side? Sentence4: Yes, I would like it to be in the east. Sentence5: That is all, thank you! Sentence6: cb13ef. Anything else? Sentence7: I can. Do you like museums? Sentence8: The Yu Garden has fabulous food. Can I book a table there for you? Sentence9: I have many choices. Do you have an area preference? Sentence10: I'm sorry, could I get the postcode to Cambridge Artworks? Sentence11: I'm sorry I have to go now! Bye! Sentence12: Absolutely. You can reach Yu Garden at 01223248882. Is there anything else I can help with today? Sentence13: I also need to get the phone number for the restaurant. Sentence14: Okay great. Glad I could be of help. Sentence15: We have the Cambridge Artworks, the Cambridge Museum of Technology, and several galleries. Sentence16: Thanks for contacting the Cambridge TownInfo Centre and have a great day! Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I am planning a trip in Cambridge. I'm looking for a train. Sentence2: no, that is all. Thanks, goodbye. Sentence3: It will cost you 17.90 Sentence4: Where are you departing from? Sentence5: I would suggest this one the golden curry. Sentence6: your all set! Reference # is TKNF8H2H . Anything else today? Sentence7: I am departing from Broxbourne and I would like the train to arrive by 10:00. What is the price for this? Sentence8: sure what day are you traveling? Sentence9: Have a great day. Sentence10: Please book that one for 8 people on Friday at 17:00. Sentence11: No thanks. I just need the price per ticket. Sentence12: The TR5570 train will work. Would you like me to book you passage? Sentence13: Okay thank you, I'm also looking for an Indian restaurant in the east that is expensive. Sentence14: I plan to travel on friday. Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: How about moderate priced guesthouses that are 4 stars? Sentence2: Sure, please provide the address and phone number as well. Sentence3: Yes, how about the acorn guest house? Sentence4: I'm sorry, I would prefer an expensive guesthouse that includes free parking. Sentence5: I'm sorry. I'm not finding any results that meet your criteria. Would you like to try a different hotel type or price range? Sentence6: The Acorn Guest House is a very popular hotel. Their phone number is 01223353888 and address is 154 chesterton road. Would you like to book a room? Sentence7: Yes, the phone number is 01223352607. Sentence8: Could I get the address as well? Sentence9: It looks like there aren't any 4 star guesthouses that are expensive. Would you like me to try a different star rating or price? Sentence10: I'm looking for an italian restaurant that is moderately priced. Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is G9YTGB8M . Do you need anything else? Sentence12: how about a moderate price range? Sentence13: Stazione restaurant and coffee bar is available Sentence14: I'm looking for an expensive guesthouse with a 4 star rating which provides free parking. Is that possible? Sentence15: Could you give me the address and phone number of both please? Sentence16: The address is Market Hill City Centre. Is there anything else you need? Sentence17: No thank you I don't need reservations today. Sentence18: Is there anything more I can assist you with today? Sentence19: No. All set. Thanks. Sentence20: Thank you for contacting us and have a nice day. Sentence21: We have 9 moderately priced guesthouses that are 4 stars and provide free parking. Would you like a recommendation from me? Sentence22: I would like to book a table there for 6 people at 11:00 on sunday. Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User