You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: You are welcome. Thank you for TownInfo centre for your traveling needs. Goodbye. Sentence2: As long as it arrives by 8:30 that sounds good. I'll need 7 seats please. Sentence3: I am leaving from cambridge going to broxbourne and want to arrive by 8:30. Sentence4: Would you like to depart from London Kings Cross or London Liverpool Street? Sentence5: I'd like to leave from London and travel to Cambridge on Saturday around 15:00 Sentence6: I'd be happy to help. Are you departing from a specific station, or do you have a specific destination in mind? Sentence7: Hello. I need help planning a train trip. Sentence8: Please state your departure location and your destination. Also, is 15:00 the time you want to leave or to arrive? Sentence9: It does and I have booked 7 seats for you. Anything else? Sentence10: That is all, thank you. Sentence11: I would like to depart from Cambridge. Sentence12: Sure, the reference number is VATL0RJL . Is there anything else I can help you with? Sentence13: How about TR8674? It leaves at 05:01. Sentence14: Reference number please? Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System