You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: It doesn't matter. I need to be able to seat 8 people on Tuesday at 17:00. Sentence2: I was able to book you at thanh binh, your reference number is H0K8XFPQ . Sentence3: Thanks! I hope you have a great day! Sentence4: There is an Italian or Vietnamese restaurant. Which do you prefer? Sentence5: Ok great thank you. Have a great day! Sentence6: I am looking for a cheap restaurant in the west part of the city please. Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System