Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Will you be needing a reference number? Sentence2: Ok great, could you book a room for me? I need it for 2 nights and there are 6 in my party. Sentence3: Yes. what day will you be arriving? Sentence4: Yes, I was also hoping to find a museum to visit while I'm in town. Sentence5: Hi! What can you tell me about the Lensfield Hotel? Sentence6: There is The Byard Art museum and its free admission Sentence7: Booking was successful. Reference number is : Q1LRYM78 . anything else? Sentence8: Lensfield is an expensive hotel in the south. Sentence9: I would like to book starting Thursday. Sentence10: Yes, please. I'm ready to write it down. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User