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: I'm departing from Kings Lynn. I'll need to arrive by 9:15. Sentence2: Okay and where will you be departing from? Sentence3: I am planning a trip in Cambridge Sentence4: Yes, I need to book a train to cambridge on that same day. Sentence5: There is only 1 and its called the royal standard would you like to reserve a table? Sentence6: Booking was successful, the total fee is 39.2 GBP payable at the station, your reference number is JB48YR5T . Will that be all for today? Sentence7: Done! Your reference number is N8IPCZJP . Do you need help with anything else? Sentence8: Yeah that works. Can you book train reservations on that train for the same group of 4 people? Sentence9: Is there a certain type of restaurant you are looking for? Sentence10: Have a great trip. Sentence11: No that will be all. Thank you. Sentence12: The train that arrives closest to 09:15 is TR1797. It arrives by 08:58 will that work for you? Sentence13: I have heard of gastropub food but never tried it before. Would you have anything like that in the east? Sentence14: Sure can you book a table for 4 at 14:45 on friday? Question: Who has spoken the sentence 10? (A) User (B) System
Answer:
Answer: (A) User