You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: You're welcome. Enjoy your meal! Sentence2: I would be happy to make you a reservation, first I will need to know what day and time you'd like to reserve for. Sentence3: Ok. I have booked your reservation. The reference number is RBBHGYRV . Sentence4: Then may I recommend Restaurant Two Two. It is French and tre manufique! Would you like to make reservations? Sentence5: Have you eaten there? Sentence6: For 4 people at 13:45 on Saturday. I'd also like the booking reference number, please. Sentence7: Sure, can you please book a table for four in the evening Sentence8: I have several high end options available. Did you have a preference on the type of cuisine? Sentence9: Is there anything else I can assist you with today? Sentence10: Yes. Would you like to book a table? Sentence11: No, that's all. Thank you. Sentence12: Great, thanks a lot! Sentence13: I am going to be on the north side of town and would like a recommendation to a high end restaurant for dinner. Sentence14: No, I don't have a preference. Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System