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

Input: Consider Input: Sentence1: I hear its a pretty cool place. Can I get their postcode please? Sentence2: Yeah, I need a place to stay on the south side. 4 stars if possible. Sentence3: Postal is cb17sr, they do include internet and they can be reached at 01223240089, can I help with anything else? Sentence4: i am looking for a particular attraction. Its name is called soul tree nightclub. Sentence5: You're welcome! Have a great day! Sentence6: Can you book me a stay at The Aylesbray Lodge? Sentence7: The Soul Tree Nightclub is located in the area of centre. It has an entrance fee of 4 pounds. The phone number is 01223477900. Anything else? Sentence8: The postcode is cb23qf. Do you need anything else? Sentence9: You have a great day as well! Sentence10: Thanks for using our services. Sentence11: Sure! How many are staying, how many days, and what day do you want the stay to start? Sentence12: That was everything, thanks a lot! Sentence13: No I just need the postcode, phone # and if they have internet Sentence14: We have two guesthouses that are 4 stars in the south end, The Aylesbray Lodge Guest House is moderately priced, and Rosa's Bed and Breakfast is in the cheap range. Question: Who has spoken the sentence 12? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: How about the Ashley Hotel? It is on the north side of town, has 2 stars, free wifi and parking, and is moderately priced. Sentence2: Is that a 2 star hotel? Sentence3: Are there any available for less than $200 a night? Sentence4: Unfortunately, the rooms are unavailable for that day and time. Can I try a shorter stay for you or possibly a different day? Sentence5: Of course! The reference number is QZYSOMAW and the address is 74 chesterton road. May I help with anything else? Sentence6: No, it has 4 stars Sentence7: Can you make a reservation for 6 people for 3 nights starting on Wednesday. Sentence8: Yes, I was able to successfully book you for two nights. Is there anything else you need? Sentence9: The only 2 star hotels are in the north or the east. Do you mind staying in one of those areas? Sentence10: Nope, that's all I need. Thanks for your help! Sentence11: Can I have the reference number and address please? Sentence12: How about for 2 nights? Sentence13: We're glad to be of service, and please do not hesitate to contact us if you need more help while you're in Cambridge! Sentence14: Yes that would be fine with me Sentence15: There are several. Alexander Bed and Breakfast is cheap and is in the Centre. Would you like me to book that? Sentence16: Let's try a hotel type with free parking in the centre of town with a star of 2. Sentence17: Are there any rooms available in hotels with free parking? Sentence18: how about for 2 nights? Sentence19: Yes. Do you have a preference for the hotel's area or price range? Sentence20: I'm sorry. I have no 2 star hotels in the center of town. However, I have some in other parts of town. Would you care to modify your search criteria? Question: Who has spoken the sentence 10? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Your taxi is booked, look for a blue ford, phone number is 07891245613, any other questions? Sentence2: That is everything. Thank you for your help. Sentence3: I need a taxi to go between the guesthouse and the college. I want to leave the college by 07:30. Sentence4: Um really? There is no 4 star accommodations with free parking in all of Cambridge? I have a hard time believing that. Sentence5: I am still getting no results. How else may I help you? Sentence6: I am looking for the saint catharine's college Sentence7: I found that info st catharines college is located at kings parade, has free entrance and its phone number is 012233338300. Can I help you with anything else? Sentence8: Could you look again, 4 star and free wifi, does not need to be hotel can be any room. Sentence9: I need hotel tips, can you help? Sentence10: I definitely can help with that. Do you have a price range in mind? Sentence11: Sorry, there aren't any. Could I check for something else? Sentence12: Are there any places to stay that offer free wifi? Sentence13: I don't have a price in mind. As long as it has free wifi and parking, I just need the name, area, and type please Sentence14: I apologize, we actually have 19 options matching your query. Do you have a preference for price range? Sentence15: Okay, have a great time in town! Sentence16: No, price doesn't really matter. I do prefer 4 stars though, and free parking. Sentence17: What about with wifi and no parking? Sentence18: I'm sorry. It appears that there are no four star hotels in Cambridge with free parking. Can I help with something else? Sentence19: The acorn guest house is a guesthouse in the north. May I help with anything else ? Sentence20: I'm sorry, there really are none that match your criteria. Are you sure you don't want to lower your star rating? Question: Who has spoken the sentence 8? (A) User (B) System
Output: Answer: (A) User