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: Well, I'm also looking to stay somewhere for a bit. I need someplace with free wifi and parking. Sentence2: Would you prefer cheap or expensive? Sentence3: Booking was successful at the cambridge belfry, Reference number is : TNJXRQR5 . Can I assist you with anything further? Sentence4: Looking specifcally for a hotel, can you book me for 7 people for 5 nights on friday Sentence5: That is everything I needed. Thanks! Sentence6: Certainly! It is an international restaurant in the Centre of town. It is moderately-priced. It is at the Crowne Plaza Hotel, at 20 Downing Street. Would you like a reservation? Sentence7: I'd like to find out more about the bloomsbury restaurant Sentence8: Yes, there are a number of hotels with free parking and WiFi, what area do you wish to stay? Sentence9: Yes please, Friday at 18:15 for 7 people. Sentence10: There are four choices. Does it matter whether it is a hotel or guest house? Or any other preferences? Sentence11: I don't have a preference. Sentence12: Booking was successful. The table will be reserved for 15 minutes.Reference number is : G0X4NIAA . is there any way i can be of help to you? Sentence13: I would like a hotel in the western part of town. Sentence14: Thank you for using the Cambridge TownInfo centre service! Question: Who has spoken the sentence 13? (A) User (B) System

Answer: (B) System