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: I also need to book a hotel as well, called the Lensfield hotel. Sentence2: A total of 6 people and for 2 nights starting on Saturday. Sentence3: That is wonderful. I think I am all set for now. Goodbye for now. Sentence4: I need to arrive by 11:45 on Saturday. Sentence5: That fits my schedule, yes please reserve 6 tickets for us, and let me know the reference number when you have it. Sentence6: Can I interest you in a place to eat while you're town? We have many great restaurants. If you need reservations please let us know. Goodbye. Sentence7: Okay, your all set! Reference number is Z34WGFK7 . Cost of the tickets are 21.12 GBP payable at the station. Is there anything else today? Sentence8: Booking was successful. Reference number is : C52VRAL6 . Anything else? Sentence9: Sure, I can help you with that. How many people will be staying, and for how many nights? Sentence10: What day will you travel? Sentence11: I'd like to find a train leaving from Ely to go to Cambridge, please. Sentence12: Could you try one night instead of two? Sentence13: I'm sorry, that day is not available or you would need a shorter stay is there anything else I could do instead? Sentence14: We have 3 trains, TR0554 leaves at 09:35 and arrives at 9:52, would you like me to book you a trip? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User