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

Sentence1: It is 37.80 pounds and travel time is 105 minutes. Do you need anything else? Sentence2: Okay, I guess that would be quite a lot of typing. How about this: I need a train leaving from Leicester sometime after 21:45 on Thursday. Sentence3: There are 202 entries, can you please be more specific? Sentence4: I have train TR8149 leaving at 22:09,is that okay? Sentence5: That is fine. Can you give me the price and travel time, please? Sentence6: What time would you like to leave? Sentence7: Anytime after 21:45 is good. Sentence8: List all thursday train times heading to cambridge. Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System