You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Sounds good, let me know if you need anything else. Sentence2: What time would you prefer? Sentence3: I have booked your taxi from ely train station to chiquito restaurant bar to arrive by 13:15. Booked car type red toyota, contact number 07582230600. May I help with anything else? Sentence4: No, that is it. Thanks! Sentence5: Hi. I would like to book a taxi to the Chiquito Restaurant Bar. I will need to be picked up at the Ely Train Station. Sentence6: I need to arrive by 13:15 please. Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System