Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: You're hotel reservations have been made. Your reference number is HKBN4ZXY . Is there anything else I can assist you with? Sentence2: The TR2929 can get you there by 12:07, it departs at 11:29, can I book you for tickets? Sentence3: Thank you that was all I needed. Sentence4: Thank you. I also need information on the Gonville Hotel. Can you look at that for me? Sentence5: The hotel will also be for 5 people starting sunday Sentence6: Okay, the booking was successful. The total cost is 50.5 GBP and it can be paid at the station. The reference number is OOGHNZGW . Sentence7: Yes, of course. What would you like to know? Sentence8: I need to take a train to Bishops Stortford on Thursday. Sentence9: Thank you for using the Cambridge TownInfo centre! Sentence10: Ok, I am getting the info up now, how many people, and what will be the first night? Sentence11: Yes I would like a booking for 5 people. Sentence12: I can definitely help you with that. Do you have a particular time of day you want to depart? Sentence13: My schedule is somewhat flexible but I need to arrive by 14:00. Sentence14: i need to book that hotel for four nights. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System