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, for 7 people please. If I could have the reference number that would be great. Sentence2: that is it for today thank you Sentence3: Great, thank you. I'm also looking for a 3 star guesthouse located in the north with free parking. Sentence4: Are there any 3-star guesthouses at all? Sentence5: My apologies. Our system only calculates trips either to or from Cambridge, so we are unable to make this reservation for you. Sentence6: Yes, please. I need tickets for 7 people. Sentence7: Success! I have booked you on this train and your reference number is 9M4R8Z4V . Sentence8: I will be traveling on Sunday and need to go to ely. Sentence9: Can I book a train with the same requirements from Kings Lynn to Cambridge? Sentence10: I have found one for you. The Hamilton Lodge is a 3-star guesthouse in the north with free parking. Sentence11: Yes, I believe so. Thank you. Good bye. Sentence12: Okay. What day will you be traveling and what is your destination please? Sentence13: I need to arrive by 09:45. Sentence14: I need a train leaving from kings lynn. Sentence15: There is only one train that day. TR9102 would you like me to book this? Sentence16: Hamilton Lodge's phone number is 01223365664, they're at 156 chesterton road, and they're moderately priced. Would you like to book a room? Or is there anything else I can help with? Sentence17: Sorry, I couldn't find anything matching that. Sentence18: Great! And you're welcome, have a great day! Sentence19: Sure. Do you still want to leave on Friday? Sentence20: Please give me their phone number, price range, and address Sentence21: Thank you for using our services. Have we met all of your needs today? Sentence22: What if I left on Friday? I need to book it for 7 people and I need the reference number please. Sentence23: I'll be happy to book that for you. Do you have a departure or arrival time preference? Sentence24: I'm sorry, but there are no trains that travel between Kings Lynn and Ely. Question: Who has spoken the sentence 1? (A) User (B) System
Answer:
Answer: (B) System