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: Thanks. You too! Goodbye. Sentence2: Get back in touch if you need help in the future. Goodbye. Sentence3: I need information on trinity college Sentence4: You're welcome! Have a great day. Sentence5: Okay, I've pulled up Trinity College. What information do you need? Sentence6: No, that is all I need today. Thank you very much! Sentence7: Ok. Trinity college is a college and the address is trinity street. Anything else? Sentence8: I need to know the attraction type and address. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: It seems there are thirteen trains to Broxbourne arriving by 19:00. What time would you like to leave? Sentence2: Let's book a train, I'll be departing from cambridge and going to broxbourne. Lets look for something on wednesday arriving in broxbourne by 19:00. Sentence3: Thanks! Now I need to find a Lebanese restaurant in the expensive price range. Can you help me find one? Sentence4: We're not picky, please book any train arriving in Broxbourne by 19:00 for 4 people. Sentence5: Is there any in the East? Sentence6: I'm afraid there isn't an expensive Lebanese restaurant in the city. Sentence7: Thanks for all your help. I think I'm good now. Sentence8: There are 4 indian restaurants in the east. Did you have a preference on price? Sentence9: You're welcome, have a great day! Sentence10: I'd like someplace expensive, please. Sentence11: Okay, your booking was successful. Your total fee of 71.59 GBP is payable at the station. The reference number is B5E7R2LE . Sentence12: What about one that serves indian dood? Sentence13: Unfortunately, the only Lebanese restaurant in town is moderately-priced. Would you like to book that restaurant or should I search for a different restaurant? Sentence14: I am planning a trip to Cambridge Sentence15: I am definitely assist with planning that trip. Do you want to start with booking a train, or search a restaurant? Sentence16: I have 2 that are expensive. May I suggest Sitar Tandoori? Would you like to book that? Sentence17: Yes, I need a table for 4 people at 10:15 on Wednesday, if that day is not available then try Friday and provide the reference number. Sentence18: Booking was successful. The table will be reserved for 15 minutes. Reference number is : UYGNM1SV . Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User