You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Solution: Answer: (A) User
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

New input: Sentence1: Your train has been booked and your reference number is UXYKEGNB . May I help you with anything else? Sentence2: I'll be leaving from Kings Lynn. Sentence3: I am looking for information in Cambridge Sentence4: I also need a train to Cambridge. Sentence5: Ok wonderful, what will be your departure location? Sentence6: Is there a date and time that you would prefer? Sentence7: That's it! Thank you for your help! Sentence8: Please book me 1 ticket for the TR0415. Sentence9: Yes, there are 5 colleges in the west! Some are free and some have a small fee. Would you be interested in one of those? Sentence10: churchill college would suit your needs. The phone number is 01223336233 and the entrance fee is free. Sentence11: Yes, on Monday and I need to leave after 16:15. Sentence12: Okay the TR0415 leaves at 17:11 and arrives by 17:58. Sentence13: Sure, I can help you with all kinds of information. What do you need to know? Sentence14: Sure, just pick one, please? I'll need the entrance fee and phone number. Sentence15: Sorry, no parks in the west. Sentence16: hmm, what about a college? Sentence17: Sure, any time! Sentence18: Are there any good parks to visit in the west? Question: Who has spoken the sentence 3? (A) User (B) System
Solution:
Answer: (B) System