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

Sentence1: If at all possible, I would like to leave after 16:45. Sentence2: Thank you for your help. That will be all. Sentence3: I need information on trains leaving on Friday. Sentence4: No thank you. I need info on cafe jello gallery. Sentence5: The price for the train is 4.40 pounds. Can I book this for you? Sentence6: Ok, there are many trains that day. Do you know your destination? Sentence7: What is the price? Sentence8: I'm going from Ely to Cambridge. Sentence9: What time would you like to leave by? Sentence10: They are a museum in the west. They offer free entrance. They are located at 13 Magdalene Street. Their postcode is cb30af. Their phone number is 01223312112. Sentence11: I have train TR2759 leaving at 17:35 and arriving by 17:52. Would you like to make reservations? Sentence12: Thank you for using the Cambridge Town Info service! Enjoy your time in Cambridge Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System