You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: No, that will be all. Thank you! Sentence2: Thanks! Can you book a room for 5 people please? We'll be arriving on Monday and staying 5 nights. Sentence3: I have that room booked for you. The reference number is RNC1KZBT . Is there anything else I can help with today? Sentence4: Sure thing, here is the address 156 chesterton road Sentence5: I'm looking for information on a hotel called hamilton lodge. Sentence6: Enjoy your stay! Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System