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

[EX Q]: Sentence1: Sure, i can help you with that. Where will you be departing from? Sentence2: Okay, and what is your destination? Sentence3: I want to leave from the train station. Sentence4: i want to book a taxi. Sentence5: Can you tell me what time you would like to leave? Sentence6: Got it, your booking has been completed! Look out for a blue tesla, contact number 07520411520. May I assist with anything else? Sentence7: I want to leave london kings cross train station after 02:00 Sentence8: I have booked you a white ford. The contact number is 07064257037 Sentence9: Oh, I'm sorry I need to get to gallery at twelve a high street. Sentence10: It's called gallery at twelve a high street. Sentence11: I'm sorry, I don't understand. What is the gallery name you want to travel too? Sentence12: Reservation reserved, let me know if you need any more assistance with anything else. Sentence13: Perfect!! Thank you for all your help. Sentence14: That will be all. Thank you. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes try 15:30 on saturday and need a reference number thank you. Sentence2: I'd be happy to help you find something. Are you looking for something in town centre? There are cinemas, colleges, concert halls just to name a few. Sentence3: I'd love to try a local restaurant Sentence4: Just do what I say! I don't care what you choose! Give me the necessary information too. Then, get me a restaurant in the east that's expensive north indian food Sentence5: How about expensive restaurants that serve Indian food in the same area? Sentence6: Booking was successful. The table will be reserved for 15 minutes. Reference number is : MKRUJ1BR . Is there anything else I can do for you? Sentence7: I apologize but I was not able to book for that time. Would you like me to try another time slot? Sentence8: Try the Cambridge Museum of Technology which is a museum. The entrance fee is 5 pounds and postcode is cb58ld. There are no expensive North Indian restaurants in the east. Sentence9: First, I need an attraction in the east. Can you choose one and get me the entrance fee, postcode, and attraction type? Then I'd like an expensive restaurant in the east. Sentence10: I'm sorry, that's a lot of information for just one response. There are 10 attractions in the east - do you care what sort? Sentence11: We are happy to help. Thank you for using our service. Have a great day! Sentence12: I want the Pipasha for 1 at 16:30 on Saturday. Sentence13: We have many restaurants in town. What type of cuisine are you looking for, and what's your budget like? Sentence14: For expensive restaurants with Indian food, we have Pipasha, and the Sitar Tandoori. Sentence15: Great! That is everything I needed. Thank you! Sentence16: I'm looking for someplace to go in town. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Is there anything else I can do for you? Sentence2: nope, that's it thanks! Sentence3: Certainly! Their address is 56 Saint Barnabas Road. Is there anything more I can help you with? Sentence4: Thank you, please. Sentence5: Thank you very much for your help today! Sentence6: Let me check into that for you. Sentence7: I also need a train arriving by 17:45 on Sunday. Sentence8: Could you please let me know when that departs and what the total travel time is? Sentence9: Have a wonderful day! Sentence10: That departs at 15:21 and the total travel time is 105 minutes. Sentence11: How about TR7423? it leaves at 0500 Sentence12: I'm looking for a expensive guesthouse. Sentence13: Alexander bed and breakfast is available, would you like to book it? Sentence14: Sure, I'll go with a cheap one. Sentence15: I'm afraid not. Would you prefer a cheaper one, or perhaps a hotel? Sentence16: How silly of me to recommend an early morning train when you need to be there in the afternoon, I apologize TR9992, arrives by 17:06, interested in tickets? Sentence17: No, I don't need to book at the moment, but I would like the address. Sentence18: Sorry the train should arrive in Leicester by 17:45 and depart from Cambridge on Sunday. Sentence19: Are there any expensive guesthouses in any area? I just need it to have free parking. Sentence20: Would you settle for a moderately priced 4 star? Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]:
Answer: (A) User