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: Booking was successful, the total fee is 116.2 GBP payable at the station. Reference number is : M0H2YQDY . Is there anything else I can do for you? Sentence2: Try for a 4 star instead. Sentence3: I don't have to leave at exactly 15:15. I just need to leave after that time and travel to Cambridge. What are my choices? Sentence4: Thanks! And if you think of anything more that you need, feel free to contact us again! Sentence5: That is all I will need. Sentence6: Have a great day and stay! Sentence7: Will I be able to get a train out of London Liverpool Street that leaves after 15:15, or will I need to use a different station? Sentence8: Okay, great. Thanks for your help! Sentence9: I need to be there on Friday. Sentence10: There is no train leaving at 15:15. However there is leaving at 15:39 on Friday, would you like that one? Sentence11: I am also looking for a place to stay. With free parking and one star. Sentence12: Do you need anything else today? Sentence13: Good day to you too, goodbye Sentence14: I'm afraid that I didn't find any. Would you like to try for a different star rating? Sentence15: Booking was successful. Reference number is : T4EBBLA6 . Sentence16: Okay can you make a booking for 4 nights from Friday for 7 people. Sentence17: I would like to book it for Friday for 7 people and will need a reference number. Sentence18: Sure thing I would suggest this one arbury lodge guesthouse. Sentence19: There is a train at 15:39 and every other hour after that. Sentence20: What day would you like to leave? Question: Who has spoken the sentence 9? (A) User (B) System
Answer:
Answer: (B) System