You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Thank you for using our services. Sentence2: Little Seoul is located at 108 Regent Street City Centre. Sentence3: Can you help me find a restaurant called little seoul? Sentence4: I've made your reservation for 4 on Monday at 16:00. Your reference number is PCU46V3W . Can I help with anything else? Sentence5: Thanks, will you please get me a reservation for 4 people at 16:00 on monday there? Sentence6: Thanks, that's all. Good bye. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System