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: Okay I also need a museum to go to in the centre. Sentence2: I recommend broughton house gallery Sentence3: I'd like to depart cambridge around 11:00. Can you find a train at that time? What is the price and train ID? Sentence4: Thank you, have a great trip! Sentence5: There are 10 results. What time would you like to leave? Sentence6: The center is a great place to visit museums. There are 11 options all with no entrance fee. Do you have a preference? Sentence7: No, can you recommend one? Sentence8: The TR2625 departs at 11:36 and arrives at 12:55. The price is 17.60 Sentence9: Thank you so much, that's all I need! Take care! Sentence10: Sure, what time do you need to get into Norwich by? Sentence11: Hi there, I'm looking for a train to norwich. Heading out on Wednesday Sentence12: I would like to arrive by 16:15 if at all possible. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System