Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Frankie and Bennys serves italian food in the expensive price range, and their postcode is cb17dy. Would you like assistance in making a reservation? Sentence2: Departure time doesn't matter, I just need to arrive at the stansted airport by 21:30 on Thursday, and I need to depart from Cambridge. Sentence3: When are you leaving? Sentence4: I don't need tickets at the moment, but I do need the price and train ID for that 19:40 departure, please. Sentence5: I need a train that leaves Cambridge on Thursday. Sentence6: There are 202 trains leaving Cambridge on Thursday. Would you like to narrow your search by destination and time? Sentence7: Can you tell me the postcode, food type, and the price range? Sentence8: The train id for that is TR9030 and the price is 10.10 pounds. Is there anything else you'd like help with today? Sentence9: I am going to the stansted airport and I need to arrive by 21:30. Sentence10: Yes, the 19:40 train will arrive at 20:08. How many tickets would you like? Sentence11: I'm also looking for a particular restaurant, it's called Frankie and Benny's. Sentence12: Thank you for contacting the Cambridge TownInfo centre. We're here any time you need to get around Cambridge! Sentence13: No, that's all I needed. Thank you. Sentence14: Can I please have one at 19:40. I will get there by 21:30 correct? Sentence15: I was able to find it, what information would you like on it? Sentence16: I have 16 train departures fitting your preferences. They leave every :40 of the hour starting at 5:40 to 20:40, would you like me to book one of these? Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User