Given the task definition, example input & output, solve the new input case.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
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
Output: Answer: (A) User
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 case for you: Sentence1: Their ID is TR1039. Sentence2: OK, I have you booked at alexander bed and breakfast for 4 nights. The Reference Number is : 741JC8HU . Anything else I can help you with today? Sentence3: Yes please. Could you also give me the train ID? Sentence4: Ok, thank you. I also need some help finding a guesthouse. I also would like free wifi. Sentence5: There is a train at 13:35 that cost 4.40 pounds. Would you like to take it? Sentence6: We've got a lot of options for guesthouses, what area do you want to stay in? Sentence7: That takes care of it. Thank you very much. Sentence8: I'd like to depart from Ely on Wednesday after 12:15. Sentence9: I need a train to cambridge Sentence10: Yes, that sounds good. Sentence11: That's fine, I'd like to book it for 4 nights then. Sentence12: You are welcome. Have a very nice stay. Sentence13: The booking for Alexander Bed and Breakfast was denied for 8 guests staying five days, starting on Wednesday. Would it be possible to plan a shorter or longer stay? Sentence14: Please be specific about when you are leaving and by what time you intend to arrive to help me to narrow down. Sentence15: I'd like a cheap place in the centre for 8 people and 5 nights starting Wednesday. Sentence16: Alexander Bed and Breakfast, 56 Saint Barnabas Road is inexpensive and rated 4 stars. Would you like me to book that? Sentence17: I would like to stay in Cambridge please. Sentence18: Ok, centre, north, east, west, or south side? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System