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

Example Input: Sentence1: There's a lot to do in the south. There's a cinema, entertainment, museum, nightclub, park, and theatre. What sounds good to you? Sentence2: Maybe we can do a picnic in the park. Can you tell me about what's available? Sentence3: That sounds great, thank you. I'm also looking on information on trains arriving from cambridge by 15:15. Sentence4: you're welcome. i hope you'll have a wonderful and adventurous picnic. Goodbye Sentence5: How about wandlebury country park that is located in the south park of town? It is also free. Sentence6: No thank you. Sentence7: My pleasure. Can I help you with something else? Sentence8: Your best bet would be the TR3685 which leaves Cambridge on Friday at 13:00 and gets to London Kings Cross at 13:51. Sentence9: Okay and what day would you like to travel? Sentence10: I'm feeling adventurous and would love to get recommendations about places to visit in the South Sentence11: Perfect. Thank you for your help today. Sentence12: I would like to travel to london kings cross on friday. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

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: The price range at the Avalon is moderate. Do you have any more questions? Sentence2: Cool. Thanks I'm good now. Goodbye. Sentence3: First could you tell me the price range for the Avalon? Sentence4: I would really like a four star guesthouse in the north area, I don't need parking. Sentence5: I would prefer a guesthouse thats 4 star rated. Do either of those fit the bill? Sentence6: Yes both have free internet. Which one do you prefer? Sentence7: You have a wonderful day! Sentence8: Good evening. I'm kind of in a situation. The hotel I had planned to stay was overbooked and I need to find me a room pretty quickly. Can you help? Sentence9: Yes they does, but no free parking though. Sentence10: Not really. But it should be in the North. Sentence11: No, I'm afraid they're both two stars. Would you like to try one of them anyway? Sentence12: Yes, can you confirm if the Avalon has Internet, please? Sentence13: There are many hotels available, do you have any preferences to price or area? Sentence14: There are two hotels on the north end, the Ashley Hotel and the Lovell Lodge. Which would you like? Sentence15: Okay, I've found several place that meet those requirements. I suggest the Avalon. Would you like me to make a reservation for you? Sentence16: Do they have free wifi at either of them? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System