Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: No, I don't need a reservation there. I do need a train from cambridge on thursday. I'll be going to Norwich, and I need to get there by 17:30. Sentence2: Yes please I would like to book. Sentence3: I need 3 tickets please. Sentence4: Thank you for using our service. Have a wonderful day! Sentence5: The Missing Sock is located at Finders Corner Newmarket Road, and their postcode is cb259aq. Would you like to reserve a table there? Sentence6: There is only one restaurant that fits what you are looking for and is called The Missing Sock. Would you like to book there? Sentence7: TR8604 will be arriving at norwich by 16:55 on Thursday. That is the closest to your requested time, would you like to book? Sentence8: Of course. It is 01223812660. Is there anything else I can help you with today? Sentence9: Great how many tickets will you need? Sentence10: Where in Cambridge is The Missing Sock located? Sentence11: Your booking was successful. The total is 52.8 GBP, payable at the train station. Your reference number is R22NVXLA . Is there anything else I can help you with? Sentence12: Hi, I'm going to visit Cambridge and am interested in finding a cheap restaurant that serves international type fare. Sentence13: that is it, thank you very much. Sentence14: Sure but can I also have the phone number as well? Sentence15: I would like a train that arrives at Cambridge at 17:30 Sentence16: Before we get to the train, you mentioned wanting to make a reservation at The Missing Sock. Would you like to do that? Question: Who has spoken the sentence 10? (A) User (B) System
A:
Answer: (A) User