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: Ok I have found the hotel. Would you like to book a room? Sentence2: Great, yes please. There will be 7 of us arriving on Wednesday. We'd like to stay for 4 nights. Sentence3: I'm looking for a hotel called avalon. Sentence4: You reservation was booked. The reference number is KB5QHVIU . Do you need help with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System