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

Ex Input:
Sentence1: No that's all. Thanks. Bye! Sentence2: Yes, that's right. Which of the 12 options would you recommend? Sentence3: Yes, would you try 2 nights instead, please? Sentence4: That's great. Please make a reservation for 1 on Monday. I'd like to stay 3 nights. Sentence5: Your booking was unsuccessful. Would you like another day or a shorter stay. Sentence6: Are they expensive? I would like something nice. And do they have free parking? Sentence7: Please check for something expensive first. If you don't see one, then we can come back to that. Sentence8: Booking was successful. Reference number is : JAKCI7JO . Is there anything else we can help you with today? Sentence9: How about Archway House? It's at 52 Gilbert Road cb43pe, and the phone number is 01223575314. Would that work for you? Sentence10: Yeah, that's fine. Oh, and I need free parking! Sentence11: There is the Acorn Guesthouse that is located in the north side of town. Would you like me to make a booking? Sentence12: I hope you have a great rest of the day. Sentence13: Can you tell me about a nice guest house in your city? I don't care how much it costs. Sentence14: They're a moderate guesthouse with free wifi and parking. Would you like to book a room? Sentence15: So to clarify, you need a guesthouse with free parking, and a moderate price range is acceptable? If so, I have 12 different options for you. Sentence16: It looks like all of the places in the expensive price range are hotels rather than guesthouses. Would you like to consider a different price range? Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Great. You should expect a blue volkswagen . You can contact them on 07261965496 Sentence2: Where will you be headed? Sentence3: Thank you! That's all I need for now. Sentence4: Great, I hope you have a great visit! Sentence5: I'll be headed to the Cherry Hinton, of course. Sentence6: THanks so much you have been a huge help. Sentence7: Can you help me find a moderately priced restaurant in the center of town? Sentence8: How about asian oriental that is in the moderate price range located in the centre of town? Sentence9: cool I would need the address, postcode, and phone number. Sentence10: There is no information on the entrance fee since there are a variety of facilities. Anything else I can help with? Sentence11: How about the cherry hinton village centre? Sentence12: Sure, I can help with that. Is there a certain cuisine you are looking for? Sentence13: That sounds perfect! Do you know the entrance fee? Sentence14: Have a nice day. Good bye. Sentence15: Okay, great. I'm also looking for an attraction in the same area. I'd like it to be multiple sports. Sentence16: No preference really. whatever you recommend Sentence17: Okay, the yippee noodle bar is at 40428 King Street City Centre postal code cb11lh and it's number is 01223518111. Is there anything else I can help you with? Sentence18: I need to book a taxi to commute between the 2 places. I want to leave the restaurant by 14:30. Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: thanks i want to get its entry fee and address Sentence2: You're welcome, let me know if I can assist with anything else. Sentence3: It is a nightclub in centre at 1 wheeler street. Phone is 01223842725. Do you need any more information? Sentence4: Yes, there is a 5 pound entrance fee for the club. Sentence5: I would like an expensive 3-star hotel. Sentence6: The address was just given to you and the phone is 01223842725. Sentence7: The Lensfield Hotel does have free parking. I can assist you with that reservation. Sentence8: Hi! I'm looking for an attraction named Kambar. Sentence9: Thank you so much. I appreciate your help with this. Sentence10: I am also interested in a place to stay, that includes free parking. Sentence11: That is all, thank you for all your help. Sentence12: Just to confirm, does the Lensfield have free parking? If so I'd like to book for 6 people, 3 nights, starting on thursday. Sentence13: in my opinion, the lensfield is much more updated than the gonville. do you need me to book a room? Sentence14: Do you have an area or price range in mind? Sentence15: What do you recommend? Sentence16: Yes, can you please book a room with the details I already provided. Sentence17: Gonville hotel is in the centre, the lensfield is in the south, any preferences? Sentence18: Your room has been booked. Your reference number is CAFW873C . Sentence19: Is there a entrance fee? Sentence20: No problem. Is there anything else I can help you with today? Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System