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'm also looking for a restaurant in the centre of town that serves chinese food. Sentence2: I need to leave bishops stortford. Do you have a train going out? Sentence3: The Ugly Duckling sounds interesting! What's their address? Sentence4: I'd like to go to Cambridge and would be leaving on Thursday after 16:30. What is available then? Sentence5: Fantastic, have a great day! Sentence6: They are 10.10 pounds each Sentence7: I have 4 choice for you. The Ugly Duckling, Tang Chinese, HK Fusion, and the Sesame Restaurant and Bar. Does one of these sound like something you would like to try? Sentence8: No thank you. That is all. Sentence9: The Ugly Duckling is located at 12 St. Johns Street City Centre. Their postcode is cb21tw. Is there anything more I can help with? Sentence10: There's a train that leaves at 17:29 and arrives by 18:07. Does that sound okay? Sentence11: I am sure I do, where would you like to go? Sentence12: Yes, that would work. What is the price of a ticket? Sentence13: There are several Chinese restaurants in the centre of town. What price rnge are you looking for? Sentence14: I prefer something expensive. Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Thank you. I am also looking for a particular restaurant, it is called Charlie Chan. Can you provide me its address? Sentence2: I want able to book your room at the Gonville Hotel for you for the two nights. Your reference number for this is KYXT8TUS . Sentence3: I would like to book for four people for three nights beginning on Tuesday. Sentence4: No, thank you. That's all I needed today. Sentence5: Does the Gonville Hotel have guesthouse accommodations? Sentence6: Yes please book it for four people in 3 nights starting on Tuesday Sentence7: Before I book this hotel I just want to inform you that I have confirmed that it is not a guesthouse but a hotel. Would you still like me to book? Sentence8: No how about two nights? Sentence9: I believe so, yes. Sentence10: Unfortunately it can not be booked for 3 days. Did you want to get information about a different hotel instead? Sentence11: I am looking for a 3 star hotel with free parking in Cambridge. Sentence12: Absolutely. On what day, for how many people and how long is your stay? Sentence13: Certainly! The address for the Charlie Chan is Regent Street City Centre. Would you like me to book a reservation? Sentence14: Thanks for contacting Cambridge TownInfo centre. Let us know if you need anything else and have a great day! Sentence15: I found a handful of locations that might suit your interests. Would you care to check out the Gonville Hotel? It has everything you are looking for in accommodations. Sentence16: Can you book this hotel? Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I'll need some additional information from you before we can proceed. Where will you be traveling to and on what day? Sentence2: Actually, I do need something else. A train home that leaves Cambridge after 16:45. Sentence3: I need to find a modern european restaurant in the south please. Sentence4: You all set the reference number is ALH3FL92, can I help with anything else? Sentence5: I can make the reservation for you. Sentence6: I have train TR2153 that will leave at 17:29 and arrive in Bishops Stortford at 18:07. Would that work for you? Sentence7: Your booking is successful. Your reference number is JCI12G5U . Is there anything else I can help you with? Sentence8: No thank you. That's it. Bye! Sentence9: I need to go to Bishops Stortford on Tuesday. Sentence10: Yes, the restaurant alimentum is a great choice, would you like me to book a table for you? Sentence11: Great! I just need the reference number. Sentence12: Thanks! Have a great day! Sentence13: Yes, please! I'd like a table for 3 on Monday at 13:00, please. Sentence14: No, that is all I need today. Thank you for your help! Sentence15: You are welcome. Have a nice day. Bye. Sentence16: That's perfect. Can you make a reservation for 3 on that train, please? Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:
Answer: (A) User