Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I would like to find out information about a hotel called Warkworth House. Sentence2: What time would you like to leave around? Sentence3: Warkworth house is a guesthouse in the east area. It is moderate pricing with 4 stars. It offers free parking and internet. Would you like a reservation? Sentence4: Yes please. It'll be for 4 nights. Sentence5: Okay the booking was successful. The reference number is HZ6B38TH . Sentence6: In order to book, can you tell me the number of guests, number of nights and the day of the week you want to start your stay? Sentence7: I'm also looking for a train. I'll be traveling back to Broxbourne on Friday. Sentence8: Will you be leaving from Cambridge. Sentence9: Thank you. Can I get a reference number for the booking? Sentence10: I need to book it to 2 people for 4 nights starting from wednesday. Sentence11: I will go ahead and book your room. Sentence12: yes i will be leaving from Cambridge. Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System