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

Example Input: Sentence1: Thank you for using our services. Sentence2: Absolutely, their phone number is 01223358966. Sentence3: You've given me everything I need. Thanks. Goodbye. Sentence4: Am looking for the Parkside Police Station Sentence5: You're welcome. Is there anything else I can help you with today? Sentence6: Thanks for all of your help! Sentence7: You can contact them at Parkside, Cambridge, CB11JG Sentence8: Can I also get their phone number please? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: No thank you. I do need help finding places to go in town. I'm looking for entertainment in the centre of town. Sentence2: The Alexander bed and breakfast is located in the centre. The phone number is 01223525725. Sentence3: Okay! Just to clarify, from where will you be departing? Sentence4: the address is 56 saint barnabas road Sentence5: what's their address? Sentence6: There are several available. Do you have a preference on if there is a fee or free? Sentence7: I dont see any entertainment in the center of town. Could I try a different area for you? Sentence8: I'd like to stay in a good part of town. Can you please give me the phone number? Sentence9: Okay, how about 2 stars? It does need to include free parking. Sentence10: Great! I have booked a taxi for you. The car will be a yellow audi, and the contact number is 07663388074. Can I help with anything else? Sentence11: ashley hotel is a nice 2 star hotel. Sentence12: Okay, christ's college is free admission. Sentence13: How about a college instead? Sentence14: There are actually no 1-star accommodations anywhere in Cambridge. Sentence15: It is a guesthouse. Want me to book it? Sentence16: Free would be preferable. I also need a taxi. Sentence17: I need a place to stay in Cambridge. It should be either a hotel or guesthouse with 1 star and moderate price range. Can you help me with that? Sentence18: What hotel type is that? Sentence19: I would also like to book a taxi to and from the hotel that leaves by 13:30. Sentence20: I am so sorry. I don't know where my head has been. I need to leave the hotel by 13:30, going to Christ's College. Sentence21: At 4 stars you have many options. What part of town would you like to stay in? Sentence22: you have been of great help thank you Sentence23: How about a hotel with 4 stars instead? Sentence24: I am glad. thanks you too. Question: Who has spoken the sentence 23? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You'll be in a white Skoda and the contact number is 07935 536 503. Can I confirm, though, that you wish to leave the restaurant at 5:15 in the morning? Sentence2: Any of them will be ok I also need the postcode and area it's in. Sentence3: The postcode is cb21uj. Is there anything else I can help you with? Sentence4: I recommend kings hedges learner pool in the north the postcode is cb42xh. Is there anything else I can help you with today? Sentence5: There are 2 and they are both in the centre. Anatolia & efes restaurant. Which do you prefer? Would you like a reservation? Sentence6: Yes, I also want to book a taxi. Can you help me with that? Sentence7: Can you give me the postcode? Sentence8: No thank you that will be all Sentence9: I have four, what area were you looking to swim in? Sentence10: the restaurant and the swimming pool of course. I want to leave the restaurant by 5:15 sharp Sentence11: Can I get more information about Anatolia? Sentence12: Moderate Range Turkish food. Phone, 01223362372. Anything else? Sentence13: Great - you are all set with your white Skoda. Anything else I can help with? Sentence14: Perfect, thanks. Can you also help me find a good Turkish restaurant that's moderately priced? Sentence15: Great! Have a nice day! Sentence16: Hi, I was wondering if there was a swimming pool that an out of town person could use while visiting. Sentence17: Yes, I want to leave the restaurant by 05:15. Sentence18: Where will the taxi be leaving from and going to? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output:
Answer: (A) User