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

[EX Q]: Sentence1: No, you have been a great help. Thank you. Good bye. Sentence2: I would be happy to help you find a train. Can you confirm where you will be departing from? Sentence3: I quite enjoy Byard Art Museum located at 14 King's Parade. It is free also. Can I give you any more information? Sentence4: I could use some help finding a museum to visit. Sentence5: Which area is it in? And can you also give me the post code? Sentence6: Yes, I'll be departing from peterborough and it needs to arrive by 20:45. Sentence7: TR9805 will arrive at 20:38, would that work for you? Sentence8: Byard Art is south and the postcode is cb21sj. Would you like information on another attraction? Sentence9: I am looking for a train on Friday to Cambridge Sentence10: There are many lovely museums in Cambridge. Would you prefer a certain type of museum, or a particular neighbourhood? Sentence11: Yes please book me tickets for 5 people Sentence12: It's been my pleasure. Thanks for using our service. Good day. Sentence13: May I help you with anything else, such as a restaurant? Sentence14: No, that one sounds perfect, thank you. Sentence15: The booking was successful the price is 82.5 pounds your reference number is 7HQD6471 . Do you need anything else? Sentence16: I'm open to just about anything. What's your favorite? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: The Museum of Archeology and Anthropology is located in the center. Would you like more information? Sentence2: Yes, you have. Thank you. Sentence3: Yes I'd rather find one in the centre, a museum. I just need the entrance fee and the address. Sentence4: Thank you for using our services. Have we met all of your needs? Sentence5: I need the entrance fee and address please. Sentence6: Of course. The departure time is 9:59. The duration of the trip is 88 minutes. Can I help with anything else today? Sentence7: I am looking for information in Cambridge Sentence8: Could you check again. A museum in the centre. Sentence9: That's alright. But now what I do ned is to find a train from cambridge going to london liverpool street. Could you help me? Sentence10: admission is free and it's located at university of cambridge, downing street Sentence11: If we can be of further assistance, please contact us again. Thank you. Good-bye. Sentence12: I don't think you do but it's not in the database. Would you like the number so you can check before you go? Sentence13: No, that will be all. Thank you. Sentence14: Museum and I need postcode adress and entrance fee please Sentence15: no such attractions in the north Sentence16: I need a museum to visit in he centre. Sentence17: Is Cambridge Artworks in the center of town? I have get to liverpool station by 11:30 on Saturday. Sentence18: Train is TR1887 arrives at 11:27. Shall I book it ? Sentence19: Cambridge Artworks is a great museum! The address is 5 Greens Road. The postcode is cb12ef. It's also free to enter. Sentence20: Do I need tickets? Sentence21: I'm also looking for a train to london liverpool. Sentence22: There's a lot to do in Cambridge. Is there a certain type of attraction you'd like more information on? Sentence23: what time is best for you? Sentence24: I need to arrive by 11:30. Are there any train that has arrival by that time? Sentence25: Can you just tell me the travel time and departure time for the TR1887 please? Sentence26: sure why not? Sentence27: No the museum is in the east, do you want an attraction in the center instead? What station will you be departing from? Sentence28: There is no museums in the centre. Can I help you with anything else Question: Who has spoken the sentence 16? (A) User (B) System
[EX A]:
Answer: (A) User