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

Sentence1: What day will you be traveling? Sentence2: You're welcome! And thank you, likewise! Sentence3: I am looking for a train going to Cambridge and should depart from King Lynn arriving by 08:15 Sentence4: Okay, there are 9 different available restaurants. What type of food would you like to eat? Sentence5: I need it on Friday. Sentence6: Can I ask you for a restaurant suggestion in the north today? Sentence7: that is it for today. have a god day Sentence8: I would like to try French and I need a reservation for 2 people at 12:45 on Friday. Sentence9: Yes, I need 2 tickets please. Sentence10: I have booked you for Restaurant Two Two. The table will be reserved 15 minutes after 12:45. Reference number is 6BD74VBB . Is there anything else I can do? Sentence11: Your booking was successful, the total fee is 19.6 GBP payable at the station . Reference number is : SKG9JJLB . What else can I help you with today? Sentence12: What types of expensive restaurants are in that part of town? Sentence13: I have Asian Oriental, Chinese, French, Italian and Indian. Any preference? Sentence14: There is a train arriving at 07:58 would you like me to book tickets for that one? Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System