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

Sentence1: It's cb12bd. Anything else I can get you? Sentence2: How about something in the south and moderate price range? Sentence3: I'll take Rice House, what's the postcode? Sentence4: There are 3 cheap chinese restaurants in the centre of town: Charlie Chan, Rice House, or Golden House. Would you like me to book any of these? Sentence5: Sure let's try chinese food. Sentence6: I was not able to find any restaurants matching your requirements. Sentence7: I'm still not finding anything. Would you like me to search a different part of town or a different food type? Sentence8: You're welcome. Have a great day! Sentence9: That's all. Thank you. Sentence10: I am looking for a cheap gastropub restaurant in the centre of town Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: TR7966 departs at 5:40. Sentence2: Your booking was successful. Reference number is : M0ZETXSZ . Is there anything else I can help you with? Sentence3: There are 33 different lodging options in town. Do you have a preference for type, area, pricerange, or star rating? Sentence4: Type doesn't matter. I want it to be cheap and in the north. With a 4 star rating. Sentence5: Great. Now I need a place to stay. Sentence6: The worth house is located in the north and cheap, would you like a reservation? Sentence7: Yes, that works. Can I get the train id number and the price please? Sentence8: I need a train to stansted airport from cambridge please. Sentence9: What area and price range are you looking for? Sentence10: What is the departure time of that also please? Sentence11: That's great. Have a safe trip. goodbye. Sentence12: It should be a 4 star hotel. Sentence13: Ok, what day will you be traveling? Sentence14: the train Number is TR7966, it will cost you 10.10 pounds. Sentence15: No thank you. I am all set. Sentence16: Is it rated 4 stars? Sentence17: Yes it is a four star. It also has free internet and free parking. When were you planning your stay? Sentence18: book it for 7 people and 5 nights starting from saturday Sentence19: Thursday. I need to arrive by 12:45. Sentence20: The closest to thing I can find is a train leaving at 5:40 on Thursday. It arrives at Stansted Airport at 6:08. Is this okay? Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: That is all I need, thank you. Sentence2: Okay, I can help you with that. We have several great moderately priced restaurants. What type of food would you like? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : R73U0ESJ . What else can I do for you today? Sentence4: Okay. Could you book that for 3 people for Sunday at 15:00. Sentence5: Do you have any Lebanese restaurants? Sentence6: You're very welcome. Good-bye. Sentence7: We have ali baba which is lebanese Sentence8: I need to find a moderately priced place to dine in the centre please. Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User