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

Sentence1: In the centre yes please. Sentence2: Can you give me the contact number for that taxi you booked? Sentence3: No, thank you. That all sounds good. Sentence4: I need info on the Cambridge and County Folk Museum please. Sentence5: At what time would you like to leave the museum? Sentence6: Anything else I can do for you? Sentence7: What type of car have you booked? Sentence8: I'm also looking to book a taxi between the two locations. Sentence9: Ok, it's called Ali Baba. How many people will be in your party? Also, what day and time would you like? Sentence10: Okay, your table is booked. The reference number is 7GD7F8A8 . Anything else I can do for you? Sentence11: Yes, I will have one pick you up Sentence12: A grey lexus will be picking you up. Can I assist you with anything else? Sentence13: I am sorry but there is not a lebanese restaurant in the west area, but I found one in the centre. Would you like me to book a reservation? Sentence14: Okay do not hesitate to call us if you need something else. Sentence15: No thank you. But thank you for all your help. Sentence16: The museum is located in the west side of town at 2-3 Castle Street. The entrance fee is 3.50 pounds. Their phone number is 01223355159. Shall I connect you? Sentence17: Your booking is completed. You will be picked up by a grey lexux. Can I help you with anything else today? Sentence18: could i get a taxi as well? Sentence19: Absolutely, the contact number for the taxi that I have booked for you is 07503689471. Is there anything else I may assist you with? Sentence20: I would like to make a reservation for 2 people at 19:30 on Tuesday. Sentence21: I just want to make sure I am at the restaurant by 19:30. Sentence22: Yes, I am also looking for a nice, moderately priced Lebanese restaurant in the area. I'd prefer it to be within walking distance of the museum. Question: Who has spoken the sentence 18? (A) User (B) System
Answer: (A) User

Sentence1: How many tickets please Sentence2: I want to go to Cambridge on Wednesday. Sentence3: I can give you all kinds of information as well as book a ticket. Where are you going and when? Sentence4: Have a great stay in town. Goodbye. Sentence5: Train TR9741 arrives at 07:52 and I have booked you for 2,here is your information:Booking was successful, the total fee is 8.8 GBP payable at the station . Reference number is : U44P6DQP . Sentence6: I want you to book it for 5 nights, starting wednesday. 2 people. Sentence7: Where will you leave from? Sentence8: Sure thing, what kind of information do you need? Sentence9: Nope, that's all I need today. Thanks for all your help. Goodbye! Sentence10: Okay that booking was successful. Your reference number is 2VD26230 . Anything else I can do for you? Sentence11: I am looking for information and would appreciate the help. Can you help with a train? Sentence12: Would you like to specify a departure or arrival time? Sentence13: I would need 2 tickets. Sentence14: Can you also look up the hotel Carolina Bed and breakfast? Sentence15: I will be leaving from ely. Sentence16: I need to arrive by 08:45 Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: You are welcome. It has been a pleasure assisting you today. Have a wonderful day. Sentence2: Yes. Please book for 1 person. Sentence3: Nusha : unit g6, cambridge leisure park, clifton road cb17dy , phone: 01223902158. Tempin : cambridge leisure park, clifton way cb17dy 08715501010 Sentence4: Well, what area do you recommend for entertainment? Sentence5: Booking was successful, the total fee is 10.1 GBP payable at the station . Reference number is : 5P72XENH . Sentence6: TR7012 departs the airport at 16:24 and arrives in Cambridge by 16:52. Would this work for you? Sentence7: I am not showing anything in the Centre, is there another area you would like to try? Sentence8: Great, thanks! Can you also recommend something fun to do in town? Sentence9: There are several trains leaving from stansted airport on thursday, is there a specific time you would prefer to leave? Sentence10: Sure, could I have the address and phone number for both? Sentence11: How about in the South part? There are two venues, Nusha and Tenpin. Would you like information about one of those? Sentence12: What area do you recommend for entertainment? Sentence13: Thank you for the entertainment information in the south. That's it. You've been helpful. Goodbye. Sentence14: I want to book a train from stansted airport on thursday. Sentence15: What side of town? Sentence16: I need it to arrive by 17:15 and go to Cambridge Question: Who has spoken the sentence 11? (A) User (B) System

Answer: (B) System