Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I have found University Arms Hotel on regent street with a 4 star rating and free parking and internet. Would you like to book? Sentence2: I need to book a hotel. I need it to be in the town center, and have a minimum star rating of 4. Sentence3: No that will be all. Sentence4: Alright. If you need anything else, feel free to ask. Have a wonderful trip. Sentence5: The booking was successful. Your reference number is 9NJXK7CF . Is there anything else I can help you with today? Sentence6: I'm sorry, the booking was unsuccessful. Would you like to try to stay for a short period or start on a different day? Sentence7: I'd like to find a korean restaurant in the same area as that hotel. Sentence8: Yes, please book that one. It will need to be for 3 people, and we'll be staying for 5 nights, beginning on Sunday. Sentence9: Would you prefer a guesthouse or a hotel proper? Sentence10: Booking was successful. Reference number is : D09887CW . Is there anything else I can do for you today? Sentence11: What time would you like the reservation? Sentence12: I would like it booked for the same day at 14:15. Can I get a reference number too? Sentence13: Yes please book it for 3 people sunday. Sentence14: Alright, what about only for 3 nights then. I can do 3, book it and give me the reference number please. Sentence15: There's a restaurant called Little Seoul. It's expensive, but also on Regent Street. Would that work? Sentence16: It should be a hotel type with free parking. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User