You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I'm heading to the bridge guest house. Sentence2: Have a great day! Sentence3: Great. Thank you. Sentence4: Hi, I am looking to book a taxi departing from Loch Fyne after 11:00. Sentence5: What is your destination? Sentence6: I have confirmed a taxi for you, picking you up at 11:00 at loch fyne. A yellow lexus will pick you up. Their contact number is 07307653173. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System