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

Sentence1: ok did you need an attraction ? Sentence2: i want to leave friday, after 10 Sentence3: I can help you out! What would you like to see? Sentence4: That is all, have a great day. Sentence5: Booking was successful, the total fee is 75.09 GBP payable at the station . Reference number is : UFTQBOZS . What else can I help you with today? Sentence6: Where will you be going? Sentence7: What day would you like to leave? Sentence8: Yes, could you please book that for me. I need one ticket. Sentence9: The Riverboat Georgina you may like. It has passenger cruises and more. Sentence10: Yes, please. I am looking for a boat type of attraction. Sentence11: No preference. Which one do you recommend? Sentence12: I am planning a trip in Cambridge Sentence13: Thank you, you too. Sentence14: The TR0044 meets your criteria. Would you like to book tickets? Sentence15: I will be going to cambridge. Sentence16: Well, I actually need a place to stay. Sentence17: Yes I have several in the center and one in the north and east. Any preferences? Sentence18: Thanks, I'm also looking for a train to cambridge departing birmingham new street. Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System