You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: For what times. Sentence2: No thank you that will be all for me, goodbye. Sentence3: Book it for 30 min earlier. I need the reference number. Sentence4: Yes, the five of us would like to eat at 17:45 before we check in to the hotel. Sentence5: Yes I am looking for a restaurant called Frankie and Bennys Sentence6: The Avalon is a 4 star moderately priced guesthouse in the north with free internet. Would you like to book there? Sentence7: I need a taxi so that it arrives by the time of my reservation at the restaurant. Sentence8: Oh! I got you the table for your original time at 17:45. Your reference number is 6MIRFIR2 . Is there anything else I can help you with? Sentence9: That one is not open, shall I try a shorter stay? Sentence10: Yes can you book it for 5 people on Saturday? We need rooms for 4 nights. Sentence11: Can you tell me some info on the Avalon hotel? Sentence12: I also need to book a taxi from the restaurant to the hotel. Sentence13: Will you need any thing else now? Sentence14: Booking was successful. Reference number is : ZWN28J72 . Do you need anything else? Sentence15: I guess we could shorten it; can you try 2 nights instead? Sentence16: That sounds great. Thank you very much. Sentence17: I'm sorry, but I cannot get you in at that time. Is there another day or time slot that would work for you? Sentence18: Your taxi has been booked to take you from Avalon to Frankie and Benny's at 17:45. Your taxi will be a black tesla and the contact bumber is 07715682347. Sentence19: its in Cambridge Leisure Park Clifton Way Cherry Hinton. should i book for you a room? Sentence20: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Question: Who has spoken the sentence 14? (A) User (B) System
A: 
Answer: (A) User