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

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: i want some mexican food. Sentence2: Dojo Noodle Bar serves asian oriental food and is located in the centre of town. The price range is cheap. Sentence3: The phone number for dojo noodle bar is 01223 363471. Would you like any other information? Sentence4: I don't care. Sentence5: You're welcome. Goodbye. Sentence6: We have four Asian oriental restaurants in centre. What price range do you prefer? Sentence7: What is the phone number? Sentence8: No, thank you, that's all I need. Thank you and goodbye! Sentence9: The only listing for Mexican food is Chiquito Restaurant Bar. How else may I assist you? Sentence10: I want a restaurant in the centre and serves asian oriental food? What is the phone number? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Hi, I'm looking for information on a particular restaurant called Galleria. Sentence2: How about you just choose the one you like best and give me the postcode, entrance fee, and area information for it Sentence3: Galleria serves European food in the moderate price range. It is located in the Centre of town. Would like to book a table? Sentence4: Booking completed! Booked car type : red lexus Contact number : 07555424165 Sentence5: That's all I needed. Thanks for all your help. Sentence6: Yes, please. I'd like the reservation to be at 18:30 for 5 people on Sunday. Sentence7: great day and thanks for inquiring with us Sentence8: Is there anything I can do for you? Sentence9: Great thank you so much for all the help! Sentence10: I would also like to find a museum. Sentence11: Please arrange for a taxi to pick me up from Byard art and take me to Galleria by 18:30. Provide car type and contact number too. Sentence12: Which area would you like the museum to be? Sentence13: Booking was successful. The table will be reserved for 15 minutes.Reference number is : ENOALFAV . Sentence14: OK great. Have a good day. Sentence15: Thank you that will be all. Have a great day. Sentence16: Byard art is a museum in the south. It is free to enter and the postcode is cb21sj. Anything more today? Question: Who has spoken the sentence 14? (A) User (B) System
Example Output:
Answer: (A) User