Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I also need to find a train departing from Cambridge. Sentence2: Yes, it is an indian restaurant in the west. Would you like to book a reservation? Sentence3: Your booking is successful. The reference number is TOD8XYZB . Is there anything else I can help you with? Sentence4: Yes, please book for seven and I would like a reference number, please. Sentence5: Yes, I would like to book a table for 7 people at 18:00 on Monday. Can you please be sure to give me the reference number? Sentence6: We would like to go to leicester on tuesday. Sentence7: Of course. What time would you like to travel? Sentence8: I have train TR7692 leaving at 12:21 and arriving at 14:06. Would that be something that would work for you? Sentence9: You're welcome, have a lovely trip! Sentence10: I have multiple trains leaving from Cambridge. What would you like the destination to be so I can narrow it down? Sentence11: We would need the train to leaver after 11:45. Sentence12: Thank you that was all Sentence13: You're all booked. The total fee is 264.59 GBP and your reference number is HC7OJ4LI Sentence14: Is there a restaurant called Cocum? Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System