Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Problem:Sentence1: i need a taxi pick up at london kings cross train station going to saigon city Sentence2: Booking completed! Booked car type : yellow bmw Contact number : 07229816957 Sentence3: I want to leave by 05:00. Sentence4: Ok, what time do you want to leave by? Question: Who has spoken the sentence 3? (A) User (B) System
Solution:
Answer: (B) System