You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: You're welcome, enjoy your day. Sentence2: How about Downing College? It has free admission and is located on Regent Street/ Sentence3: I'd like to visit a college in the center of town. Could you help me find something interesting? Sentence4: That sounds great! Can I have their phone number and postcode, please? Sentence5: No, that was all I needed to know. Thank you, you've been very helpful. Sentence6: Downing College's phone is 01223334860 and their postcode is cb21dq. Can I help you with anything else today? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: What day would you like to travel? Sentence2: Yes, go ahead and book either of those for 2 people and 3 nights beginning on Tuesday. Sentence3: Can you also recommend a three star hotel that has free wifi? Sentence4: Your booking at The Gonville coming in on Tuesday for 4 days 3 nights is confirmed for a party of 2. Your reference number is : 5GCUETMP . Anything else today? Sentence5: I need a train leaving from broxbourne. Sentence6: There are two. The Gonville Hotel and The Lensfield. Both also have free parking. Would you like me to book one for you? Sentence7: Booking was successful, the total fee is 17.89 GBP payable at the station .Reference number is : X1XG5K91 . Sentence8: I am happy to help! Goodbye, I hope your trip is lovely! Sentence9: Can you book it for me? Sentence10: No. That's it. Thank you for your help. Sentence11: I would recommend TR6788 which leaves Broxbourne at 19:32 and arrives in Cambridge at 20:32. Sentence12: I would like to travel on a Tuesday from Broxbourne to Cambridge after 19:15. Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I just booked that for you. Your reference number is 1G6KIGNS . Can I help you with anything else? Sentence2: I feel like trying Chinese today, find me a cheap place that serves it please Sentence3: Oh yes, we have three in the city centre. How about the Golden House? It's on Lensfield Road and meets your needs. Sentence4: I'll be departing Cambridge and would like to arrive in Peterborough by 19:15. Can you find a train that would get me there close to that time? Sentence5: Yes, I'll also need a train. I'm heading to Peterborough on Friday. Sentence6: The Golden House fits your needs. Would you like to book a table? Sentence7: Okay! It's a 50-minute train ride, and it costs 16.50 Pounds. Can I help you with anything else? Sentence8: I don't need to book right now. You've told me the departure time. I just need the travel time and the ticket price. Sentence9: You're welcome! Bye now! Sentence10: Which one do you suggest? Sentence11: Actually, I will need a restaurant in the centre. Do you have any? Sentence12: The lucky star is perfect for you. It's located at Cambridge Leisure Park Clifton Way Cherry Hinton. Do you need to book a table? Sentence13: We have four! 3 in centre and one south. Which area are you going to be in? Sentence14: The last train of the day will work for you. It departs at 18:06, and arrives at 18:56. Would you like to book it? Sentence15: Yes 7 people for thursday at 12:15, and can I get the reference number? Sentence16: I will be in the south. Sentence17: No, that is all for today. Thanks so much. Bye. Sentence18: I have many departures that leave for peterborough on Friday.What time would you like to leave? Question: Who has spoken the sentence 16? (A) User (B) System
Example Output:
Answer: (A) User