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

Let me give you an example: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
The answer to this example can be: Answer: (A) User
Here is why: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

OK. solve this:
Sentence1: There are 133 trains that match that trip. To narrow it down, I need to know what day you'll be traveling and when you want to arrive by. Sentence2: Great can you help me get a train from cambridge to broxbourne? Sentence3: We have three places, but I like the hotpot. Do you need a reservation? Sentence4: Thanks! That's all I needed today. You've been a great help! Sentence5: The Hotpot is a moderately priced restaurant. Their post code is cb41ep. Sentence6: Great. I have booked one ticket on TR5256 to broxbourne. The cost will be 17.89 GBP and your reference number is O9VNFTK9 . Sentence7: I have train TR5256 that leaves at 20:01 and arrives in Broxbourne at 21:01. Would that work for you? Sentence8: You're welcome! Enjoy your travels. Sentence9: Could you tell me the price range first? and the postcode? for the hotpot? Sentence10: That would be great. I'm traveling alone so just one seat please. Sentence11: I'm looking for a restaurant on the North end that serves yummy Chinese food Sentence12: I will be traveling on Wednesday and I would need to arrive in Broxbourne by 21:15. Question: Who has spoken the sentence 4? (A) User (B) System
Answer:
Answer: (A) User