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

Ex Input:
Sentence1: I have Gonville Hotel in centre area or The Lensfield hotel in the south area. What is your preference? Sentence2: I'm also looking for a hotel to stay in. Preferably a 3 star one. Sentence3: I'm planning to leave on Thursday. Sentence4: Which day are you planning to travel? Sentence5: The Gonville would be great, could you get me the phone number, price range, and postcode? Sentence6: They are in the expensive range, located on gonville place, postal code cb11ly, they are reachable at 01223366611, may I assist with anything else? Sentence7: There are several trains leaving Norwich, what day are you leaving and where are you going? I also need the time you want to leave or arrive. Sentence8: Yes the departure time is 15:16. I booked you for 8 on Train ID TR8040. The Reference number is : 1HY8AJ7Y . Sentence9: No thank you for everything. Sentence10: You are welcome. Have a good evening. Sentence11: I want a train leaving from norwich. Sentence12: As long as you mean a 15:16 departure, I'll take 8 tickets, please. Sentence13: I have a 5:16 departure to Cambridge that arrives at 16:36. Would that do? Sentence14: What area of town would you like? Do you have a price range in mind? Sentence15: I would like to leave after 14:30 and go to Cambridge, please. Sentence16: I don't have a preference for either, but I'd like it to be in the type of hotel. I'll also need free parking. Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Taj Tandoori is an expensive Indian restaurant in the South. Would you like more information on them? Sentence2: I'm looking for an expensive restaurant in the south part of town Sentence3: Thanks for your call. Goodbye! Sentence4: Thank you goodbye. Sentence5: May I have their address and phone number? Sentence6: chiquito restaurant bar is located at 2G Cambridge leisure park cherry hinton road cherry hinton. Its phone number is 01223400170. Would you like anything else? Sentence7: Yes. chiquito restaurant bar serves mexican food in the expensive price range and is located in the south part of town. Sentence8: Is there anything else? Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Sure, can you book it for 6 people on friday at 17:15 please? And then give me the reference number Sentence2: I'm glad I could help, have a great time. Sentence3: How does the Golden wok sound? It is close to that area. Sentence4: I would also like to eat some Chinese food near the hotel. Sentence5: That is all for now. Thank you for all your help. Sentence6: I have you booked at the Acorn Guesthouse, six people for four nights. Your confirmation is GLVBZVYO Sentence7: Yes, please! I'd like a room for 6 people. We'll arrive on Friday and stay for 4 nights. Sentence8: Successfully booked. Your reference number is XZZTYRWB . What else would you like help with? Sentence9: Best wishes for an enjoyable stay from the Cambridge TownInfo Centre. Goodbye. Sentence10: Thanks so much, goodbye! Sentence11: Alexander bed and breakfast looks good, would you like to try that? Sentence12: I need it to be in the north area, is Alexander bed and breakfast located there? Sentence13: Hello I am new to Cambridge and was wondering about good 4 star hotels with free wifi. Any suggestions? Sentence14: No, but the Acorn Guest House is in the north. Would you like a room there? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User