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

Example 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
Example Output: Answer: (B) System

Example Input: Sentence1: No, you have been a great help. Thank you. Good bye. Sentence2: I would be happy to help you find a train. Can you confirm where you will be departing from? Sentence3: I quite enjoy Byard Art Museum located at 14 King's Parade. It is free also. Can I give you any more information? Sentence4: I could use some help finding a museum to visit. Sentence5: Which area is it in? And can you also give me the post code? Sentence6: Yes, I'll be departing from peterborough and it needs to arrive by 20:45. Sentence7: TR9805 will arrive at 20:38, would that work for you? Sentence8: Byard Art is south and the postcode is cb21sj. Would you like information on another attraction? Sentence9: I am looking for a train on Friday to Cambridge Sentence10: There are many lovely museums in Cambridge. Would you prefer a certain type of museum, or a particular neighbourhood? Sentence11: Yes please book me tickets for 5 people Sentence12: It's been my pleasure. Thanks for using our service. Good day. Sentence13: May I help you with anything else, such as a restaurant? Sentence14: No, that one sounds perfect, thank you. Sentence15: The booking was successful the price is 82.5 pounds your reference number is 7HQD6471 . Do you need anything else? Sentence16: I'm open to just about anything. What's your favorite? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Not at this time. Thank you for the information! Good-bye Sentence2: Yes i would love to hear more information about them. Thank you. Sentence3: Yes, are there any good Indian restaurants? Sentence4: Hmm, I was looking for Fusion type food, are there any that have that? Sentence5: You're welcome. Please let us know if you need assistance with anything else. Thanks! Sentence6: Hi there, I'm hoping you can help me find a hotel in the south of Cambridge. Sentence7: I have the Pizza Hut that is moderately priced in the South and also Restaurant Alimentum that serves modern European food. Any interest you? Sentence8: I also need a place to dine that is in the same area and price range as the hotel. Sentence9: There are guesthouses available in the South Cambridge area moderately priced that have free wi-fi and parking. Would you like to hear more about them? Sentence10: The Lensfield hotel, which is expensive is the only hotel in South Cambridge. Will this work for you? Sentence11: Sure, the aylesbray lodge guest house is located at 5 mowbray road. Can I be of any further assistance today? Sentence12: Sure. May I have the address? Sentence13: Alright the aylesbray lodge guest house is a 4 star guest house. Does that interest you? Sentence14: no, I need a moderately priced place that doesn't need have free wifi or parking in the area of south, thank you Sentence15: Absolutely! The Taj Tandoori is located at 64 Cherry Hinton Road Cherry Hinton. Their postcode is cb17aa. The phone number to reach them is 01223412299. Would you like a reservation? Sentence16: Great can I get their phone number, address, and postcode Sentence17: There is one expensive Indian restaurant in the South: Taj Tandoori. Would you like to make a reservation? Sentence18: I'm sorry, there isn't. Can I provide you information on a different type of cuisine? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System