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 thank you, goodbye. Sentence2: I'm sorry, there are no Korean restaurants in the north part of town. Can I help you find anything else? Sentence3: Thank you for using our system. Good bye Sentence4: How about any area? Sentence5: I would like a restaurant in the north part of town that serves korean food Sentence6: What is the address and price range? Sentence7: Little Seoul is at 108 Regent Street City Centre and is an expensive restaurant. Do you want the phone number? Sentence8: little seoul is in the centre and serves korean food Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Does it have four stars? Sentence2: Not yet, but can you tell me what time the train arrives in Ely please? Sentence3: acorn guest house is located in 154 chesterton road should i book it for you? Sentence4: I would like to leave on Tuesday after 18:00. Sentence5: It arrives by 20:07! Anything else love? Sentence6: TR5511 leaves Cambridge for Ely at 20.07. Do you need tickets? Sentence7: I've booked your stay at the Acorn Guest House, and your reference number is IT07BRTC . Sentence8: The trip will last 17 minutes. Is there anything else you would like to know? Sentence9: Do you know what day or time you want to leave? Sentence10: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence11: I need some lodging accommodations. It needs to have free parking and Internet please! Sentence12: I would like someone to book me a place with free parking and internet. Sentence13: That should do it. Thanks so much for your help! Sentence14: I found 29 hotels matching your request. What price range and area of town would you prefer? Sentence15: Thanks a lot. Can you also help me find a train going to Ely? Sentence16: Yes. Please book it for 2 people for 4 nights starting Friday. Sentence17: Yes it does. Shall I book? Sentence18: What is the total travel time on that time? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Sounds nice, I will book for 2 people at 14:30 on Wednesday. Sentence2: Oh wait. I really want to find a museum. Sentence3: Your reservation number is ZK239M8H . Is there anything else I can help you with? Sentence4: Sure thing! Which area and price range? Sentence5: No, thanks! But will you please find me an expensive restaurant in the Centre part of town? Sentence6: an expensive British restaurant, what would be one you would recommend? Sentence7: What do you suggest? I don't know the town, so I don't have any idea where to go. Sentence8: I have about 23 museums to choose from. Is there a certain area of town I can focus on? Sentence9: Yes i need to book at hotel. Sentence10: I would recommend the Broughton House Gallery, it is in the centre and the entrance fee is free. Would you like the address or phone number? Sentence11: No thank you. Sentence12: Have a good time. Sentence13: There are many expensive restaurants in Centre. Is there a certain type of cuisine that you prefer? Sentence14: oh may I suggest midsummer house, it's great and I go there all of the time Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:
Answer: (B) System