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: I am looking for college attractions to go to in town. Sentence2: Do you need help with anything else? Sentence3: Great! I'm also looking for a moderately priced restaurant in the north area of town. Can you help me with that? Sentence4: yes, please - table for 4 at 13:45 on tuesday Sentence5: The phone number and postcode is: 01223333200 cb21tl Sentence6: You're welcome. If anything comes up please return for help. Sentence7: That sounds good. May I have their postcode and phone number? Sentence8: How about Clare Hall on Herschel Road? Sentence9: Booking was successful. The table will be reserved for 15 minutes. Reference number is : VHZUMK58 . Sentence10: Yippee Noolde bar is moderately priced, would you like a reservation? Sentence11: That is all I need. Thank you for your help! Sentence12: thank you! Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System