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: Yes, I need one in the cheap price range please. Sentence2: departure is sunday from ely. Sentence3: I'll book the one that leaves at 17:35. What time does the train arrive? Sentence4: Pizza hut city centre, ask, and zizzi cambridge all are italian restaurants in the centre part of town in the cheap price range. Would you like me to book one? Sentence5: No. Everything is perfect. Thank you for your time. Sentence6: I found four trains, one leaves at 17:35, 19:35, 21:35 or 23:35. Which would you like to book? Sentence7: I have reserved a table for three at 21:00. The reference number is OUN5OI0K . Sentence8: I need a train ticket to Cambridge, sometime after 15:45 if you can find one. Sentence9: There are 3 gastropubs in the centre. 2 are expensive the other is moderate. Do you have a preference in the price range? Sentence10: No. I'm looking for a a gastropub restaurant in the centre. Sentence11: There are no gastropubs in the centre part of town in the cheap price range. Would you like something else? Sentence12: It arrives at 17:52. Shall I go ahead and book it for you? Sentence13: Thank you for using this system! Sentence14: There are over 600 trains to Cambridge that leave after 15:45. Can you tell me the day you're traveling and your departure station? Sentence15: Yes. Can you please book Zizzi Cambridge for 3 people at 21:00 on the same day, Sunday. Sentence16: Ok, how about one serving italian food? Sentence17: That's an interesting question, but unfortunately I haven't that information. Is there anything else I can help you with, though? Sentence18: Finally. Thank you. Pizza Hut. I ate there when I was a kid. It's a long story. I wonder if this one has a jukebox. Question: Who has spoken the sentence 16? (A) User (B) System
Answer:
Answer: (A) User