You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: La Margherita is perfect for me, please book me a table at that one. Sentence2: I also would like to find an italian restaurant to eat at in the west. Sentence3: Okay, Thank You. Goodbye. Sentence4: What day and time would you like the table at La Margherita? Sentence5: The one arriving at 10:43. I just need 1 ticket and a reference number please. Sentence6: The booking was successful . Your reservation number is C9SBUT9T . Is there anything else I can help you with? Sentence7: There are two options. Prezzo is moderately-priced and La Margherita is cheap. Would you like me to book a table for you at one of those? Sentence8: Saturday at 15:15. Sentence9: No, that's it. Sentence10: Could you see if there's anything at 14:15? Sentence11: There are three trains, one arrives at 6:43, one at 8:43, and one at 10:43, which would you like to book? Sentence12: I was unable to book a reservation at La Margherita for Saturday at 15:15. Is there another day or time that you would like? Sentence13: Great! I've booked your trip on Saturday leaving Stevenage and arriving in Cambridge at 10:43. Your reference number is 5CWS7ER4 . Is there anything else I can help with? Sentence14: I want a train out of Stevenage on Saturday. Sentence15: I want to arrive by 11:30 at Cambridge. Sentence16: Alright, did you have a certain destination in mind? Question: Who has spoken the sentence 14? (A) User (B) System
Answer: (A) User