Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: I'm glad I could help. Sentence2: Tickets are 75.10 pounds. Is there anything else you need? Sentence3: What information are you looking for? Sentence4: Booking was successful. The table will be reserved for 15 minutes. Reference number is : FNXFS4G4 . What else can I help you with today? Sentence5: Yes, I've heard great things about The Cambridge Chop House. Can you tell me about it? Sentence6: No, thanks. No need to book today, but can I get the price of the ticket? Sentence7: I need transportation, specifically a train from birmingham new street. I need one that gets to my destination by 17:00 Sentence8: Will you book a table for 3 on Monday at 20:30 for me? I'll also need the reference number. Thanks! Sentence9: monday would be perfect Sentence10: TR1238 leaves at 13:40 and will get you there at 16:23, do you want me to book you? Sentence11: Thanks so much. That's all. Goodbye Sentence12: We have several! What day would you like to travel? Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System