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

Example Input: Sentence1: That was a successful booking, your reference number is T6C83P46 . Sentence2: Thank you so much! Sentence3: Not really. Anything would be fine. Sentence4: Yes, please. I'd like to book it for 6 people and 5 nights starting from monday. Sentence5: I'm not too concerned with location, but I would like it to include internet and have a 4 star rating please. Sentence6: Do you have a preferred location or price range? Sentence7: Yes, how about 3 nights? Sentence8: I recommend the Acorn Guest House. Would you like a room there? Sentence9: I'm looking for a guesthouse with free parking. Sentence10: Booking unsuccessful. Want to try for a shorter stay? Sentence11: There are 16 guesthouses that meet those requirements. Any preference on price range? Sentence12: You're so welcome. Thank you. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You are booked for a black skoda. Is there anything else? Sentence2: Thank you for your help Sentence3: Could you give me the contact number for the skoda, please. Sentence4: I'd be happy to book that for you, where are you departing from? Sentence5: No, that is it. Goodbye. Sentence6: Booked car type : black skoda Contact number : 07129813049 Sentence7: I would like a taxi to limehouse. I need to arrive by 7:15. Sentence8: You're very welcome. Do you need any further assistance? Sentence9: Thanks for using our services. Sentence10: I am leaving from nusha. Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: i am looking for places to go in town. The attraction should be in the centre and should be in the type of theatre. Sentence2: Can you also find finches bed and breakfast? Sentence3: How about the Mumford Theatre located at Anglia Ruskin Enterprise, East Road, postcode cb11pt? I love that one. Sentence4: Yes I can. You will find it on the west side of town, at 144 thornton road. Can I book you or assist with anything else? Sentence5: That sounds perfect. How much is the entrance fee? Sentence6: No, that will be all. Thank you! Sentence7: I do not know the entrance fee. You can call 08451962320 for more information. Sentence8: Are you sure you do not want me to book you a room? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System