You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Yes please. Can you book it for 2 people? We'd like to arrive Thursday and stay for 5 nights please. Sentence2: In the north, please. I'm looking for a guesthouse with free wifi, it can be 0 star. Sentence3: I have confirmed your reservation at city centre north b and b for 4 nights starting Thursday. Your reference number is GKZ1Z5LL . Is there anything else you need? Sentence4: Yes, I need it for two people and I need the reference number. I also need a guesthouse that includes free wifi. Sentence5: Yes 4 nights will work, can you book that and give me the reference number? Sentence6: We are happy to help. Thank you for using our service. Sentence7: I would like to find a taxi to the centre of Cambridge to an American modern restaurant. What would you recommend? Sentence8: I'm not able to secure 5 nights. I can book you for 4 nights 2 people starting on Thursday. Will that work for you? Sentence9: I've booked that for you. The reference number is F5TE3Q1H . As for the hotel, where in the city would you like to stay? Sentence10: I think I asked for that wrong...I'm sorry. I'd like to go to Peterborough from Cambridge on Tuesday after 14:00. Sentence11: How about the 14:19 train? It's a 50 minute trip, so you'll arrive at 15:09. Sentence12: The first available train that leaves after 14:00 from Cambridge to Peterborough on Tuesday is the TR7727. Would you like to go ahead and book a seat? Sentence13: City centre north b and b is a cheap, 0 star guesthouse located in the north with internet access. Would you like me to book this location for you? Sentence14: With so few details, I can't book you a taxi quite yet. Sentence15: I would like to book a train from Peterborough to Cambridge on Tuesday leaving after 14:00. Sentence16: No that is all. Thank you so much! Question: Who has spoken the sentence 10? (A) User (B) System
A:
Answer: (A) User