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

Sentence1: The address is 41 Warkworth Street. Can I help you with anything else today? Sentence2: Yes, I'm looking for a guesthouse with a star rating of 1. It should be in the city centre please. Sentence3: Enjoy your trip. Sentence4: Hi! I'm looking for someplace to go in the centre. Sentence5: No that was all I needed. Thank you, goodbye. Sentence6: I don't have any guesthouses that meet that criteria. Would you like me to try something else? Sentence7: Do you have any guesthouses with a star rating of zero? Sentence8: You are booked for a yellow audi. Your contact number is 07526986404. May I help you with anything else? Sentence9: What is your departure site? Sentence10: No not right now. What is their address? Sentence11: I'm sorry, we need a taxi departing from Saint Mary's Church by 3:15 going to the guesthouse. Sentence12: Yes, I do have one. The El Shaddai is in the centre and is cheap. It is 0 star rated and offers free parking and wifi. Do you need a room? Sentence13: It does not really matter can you suggest one? Sentence14: how about little saint mary's church? Sentence15: Okay, there's plenty to do in the city's centre. What kind of attraction are you interested in? Sentence16: I also need a taxi to get to little saint mary's church by 3:15. Sentence17: It is an architecture attraction it's located on little saint mary's lane postcode cb21qy. Is there anything else I can help you with? Sentence18: Sounds perfect. Is it architectural? Also, can I have the address with postcode? Question: Who has spoken the sentence 16? (A) User (B) System
Answer: (A) User

Sentence1: Okay. Can you tell me how much it costs to get in? Sentence2: No thank you, that is everything. Sentence3: I am looking for an architecture attraction somewhere in Cambridge. Sentence4: You're welcome. Have a good day! Sentence5: There are 5 different attractions all located in the centre of the city. I'd recommend holy trinity church. Sentence6: The vehicle you will be expecting is a black Tesla . The contact number is 07726876557. Anything else you need? Sentence7: Your hotel is booked starting Wednesday and your reference number is PADGS18 . May I assist you with anything else today? Sentence8: I have booked you a taxi that will pick you up at 1:15 from Holy Trinity Church. Would you like the car type and contact number? Sentence9: Yes, what can you tell me about a hotel called the Warkworth House? Sentence10: I would like to book it for 8 people for 2 nights starting on wednesday. Sentence11: Yes, please, that would be nice. Sentence12: It is free. Is there anything else that I can help you with? Sentence13: Actually, yes. I need a taxi to pick me up from Holy Trinity Church at 1:15 and take me to the hotel. Sentence14: Hey, the Warkworth is in the East part of town, it's a four star hotel with moderate pricing. What can I tell you about it? Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User

Sentence1: We would like a place in the north which includes free wifi and free parking. Can you find something fitting this? Sentence2: The reference number is MNKWT71T . Is there anything else I can help you with today? Sentence3: Yes please make reservations for sunday for 3 people. Sentence4: I have two that match your criteria. I'd recommend the Ashley Hotel on Chesterton Road. Will that work for you? Sentence5: The TR5298 leaves at 17:29. Would you like me to book tickets? Sentence6: Could you please get me three tickets for a train that leaves after 15:45? Sentence7: I would like to leave on Sunday please. Sentence8: What is the reference number? Sentence9: Your booking was successful and the total fee is 24.24 GBP. Will there be anything else? Sentence10: What day would you be needing the train? Sentence11: Hey could you help me figure out the train schedule? I need to go to Cambridge I am leaving from bishops Stanford station. Do you know the times? Sentence12: The train leaving Bishops and arriving in Cambridge has a consistent Sunday schedule. Beginning at 5:29 a.m., a train leaves exactly two hours later all day. Next train 7:29, etc. Sentence13: How many tickets are you looking for? Sentence14: i need tickets for three people. Sentence15: Do you have any preferences for the hotel, like price range or area of town? Sentence16: I also need a hotel for 3 people starting Sunday and for 4 nights. Question: Who has spoken the sentence 13? (A) User (B) System

Answer: (B) System