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

[EX Q]: Sentence1: There's a lot to do in the south. There's a cinema, entertainment, museum, nightclub, park, and theatre. What sounds good to you? Sentence2: Maybe we can do a picnic in the park. Can you tell me about what's available? Sentence3: That sounds great, thank you. I'm also looking on information on trains arriving from cambridge by 15:15. Sentence4: you're welcome. i hope you'll have a wonderful and adventurous picnic. Goodbye Sentence5: How about wandlebury country park that is located in the south park of town? It is also free. Sentence6: No thank you. Sentence7: My pleasure. Can I help you with something else? Sentence8: Your best bet would be the TR3685 which leaves Cambridge on Friday at 13:00 and gets to London Kings Cross at 13:51. Sentence9: Okay and what day would you like to travel? Sentence10: I'm feeling adventurous and would love to get recommendations about places to visit in the South Sentence11: Perfect. Thank you for your help today. Sentence12: I would like to travel to london kings cross on friday. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: You're welcome, have a great day. Sentence2: I would like modern european food and in should be located in the centre of town. Sentence3: I would like a train that leaves from stansted airport after 16:15 Sentence4: I'd like a cheap one, I don't want to spend too much on food, I want to bring back as many knick-knacks as possible. Sentence5: Please get me their postcode instead Sentence6: How many tickets do you need me to book for the train? Sentence7: I actually don't need a ticket right now. Could you please tell me the price and travel time though? Sentence8: There are 8 results for European restaurants in the centre area, would you prefer an expensive, moderate or cheap price range? Sentence9: Yes, the postcode is cb58aq. Sentence10: The river bar steakhouse and grill meets all your needs. Do you want me to book? If yes, for how many, what day and what time? Sentence11: Absolutely. The TR5365 costs 10.10 pounds and has a travel time of 28 minutes. What else can I do for you? Sentence12: There's a train leaving stansted airport for cambridge every hour on Monday, by what time would you like to arrive? Sentence13: I will be traveling on monday and need to go to cambridge Sentence14: The earliest train is TR5365 that leaves the airport at 16:24 and arrive in Cambridge at 16:52. Do you need a ticket? Sentence15: Thank you, that will be all. Sentence16: I don't care. Give me the earliest one leaving after 16:15. Sentence17: What are would you like to eat? Sentence18: Yes please thank you. Can you also assist to find me a restaurant where i can dine in the Center. My preference is Modern European food. Sentence19: I also need a place to eat. Sentence20: What day will you be traveling, and where will you be heading to? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Thanks so much, that is all I need. Sentence2: Are there any entertainment attractions in the south? Sentence3: Can I have the address, phone number, and entrance fee of Nusha. Sentence4: Thank you, goodbye. Sentence5: i also want a taxi to commute between the 2 places Sentence6: Your table is reserved, ref#39W1D7PP . Can I help you with anything else today? Sentence7: Is it in the same area as Nusha? Sentence8: I've booked you a taxi from nusha to the lucky star, arriving at 14:00. The car will be a white bmw. Contact number : 07301865482 Sentence9: I would like a chinese restaurant, please. Sentence10: Could you book me a table on Thirsday. 2 people at 14:00 Sentence11: There are two that fit your request. One is Nusha on Clifton Road and the other is Tenpin on Clifton Way. Do you need more information? Sentence12: Yes it is in the same area. Sentence13: There are 15 that I have found! What type of cuisine would you like? Sentence14: Thank you, you too. Sentence15: I will go ahead and book that now. Sentence16: Okay, great. Have a nice day. Sentence17: I can call for that. But thanks anyway. I am also looking for a cheap place to eat. Sentence18: Thank you. Can I please have the reference number? Sentence19: The address of Nusha is unit g6, Cambridge leisure park, Clifton road and their telephone number is 01223902158, but unfortunately, I do not have information on their entrance fee. Sentence20: There is one cheap Chinese restaurant in the area called The Lucky Star. Would you like me to book a reservation for it? Question: Who has spoken the sentence 19? (A) User (B) System
[EX A]:
Answer: (B) System