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: Can I get information on where you will be departing from? Sentence2: Yes, I'll be departing from London Kings Cross. Sentence3: Can you just give me their phone number and postcode? Sentence4: You're quite welcome. Goodbye! Sentence5: I would like find some information about a train. Specifically, I'm looking for details about a train that leaves Tuesday after 11:15. Sentence6: The reference number is 6SCORZPY . Sentence7: I am also looking for a restaurant that serves modern european food in the expensive price range. What do you find available? Sentence8: Certainly! Their phone number is 01223505015 postcode cb11n. Is there anything else I can help you with today? Sentence9: That's all I need. I appreciate the help. Sentence10: The TR7850 leaves London Kings Cross at 11:17 and arrives in Cambridge at 12:08. Would you like to book a ticket? Sentence11: The only place in town like that is Darry's Cookhouse and Wine Shop. It's in the center of town. Would you like a table? Sentence12: Yes please book it for 5 people and give me the reference number. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System