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

Input: Consider Input: Sentence1: TR7966 departs at 5:40. Sentence2: Your booking was successful. Reference number is : M0ZETXSZ . Is there anything else I can help you with? Sentence3: There are 33 different lodging options in town. Do you have a preference for type, area, pricerange, or star rating? Sentence4: Type doesn't matter. I want it to be cheap and in the north. With a 4 star rating. Sentence5: Great. Now I need a place to stay. Sentence6: The worth house is located in the north and cheap, would you like a reservation? Sentence7: Yes, that works. Can I get the train id number and the price please? Sentence8: I need a train to stansted airport from cambridge please. Sentence9: What area and price range are you looking for? Sentence10: What is the departure time of that also please? Sentence11: That's great. Have a safe trip. goodbye. Sentence12: It should be a 4 star hotel. Sentence13: Ok, what day will you be traveling? Sentence14: the train Number is TR7966, it will cost you 10.10 pounds. Sentence15: No thank you. I am all set. Sentence16: Is it rated 4 stars? Sentence17: Yes it is a four star. It also has free internet and free parking. When were you planning your stay? Sentence18: book it for 7 people and 5 nights starting from saturday Sentence19: Thursday. I need to arrive by 12:45. Sentence20: The closest to thing I can find is a train leaving at 5:40 on Thursday. It arrives at Stansted Airport at 6:08. Is this okay? Question: Who has spoken the sentence 2? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Have a good day! Sentence2: No thank you, that is all. Sentence3: I am looking for a train to London Kings Cross that departs after 08:15. Sentence4: The TR2000 leaves cambridge going to london kings cross on friday at 09:00. It arrives in london kings cross at 09:51. How does that sound? Sentence5: Yes. What do you have available? Sentence6: Are you departing from cambridge station? Sentence7: I'll be travelling on a Wednesday. Sentence8: That's great. Please book me two tickets. Sentence9: The booking was successful and the fee is 47.2 GBP payable at the station. Reference number is E2N0JHSY . May I assist you with anything else today. Sentence10: What day would you like to travel? Question: Who has spoken the sentence 3? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: I'm looking for a restaurant in the center of town. Sentence2: I was hoping to find a place that serves Indian food. Sentence3: I am also looking for a place to stay in the same area and same price range. Sentence4: I have two hotel in the Centre, shall I book one? Sentence5: Both Gonville Hotel and University Arms Hotel have free wifi and are expensive options in the centre of town. Sentence6: I need an address and phone number for the restaurant. Sentence7: I am unable to find any Indian restaraunts in the the center of town. Can you narrow down your preferred area please? Sentence8: Can you book me at the Gonville Hotel ? I also need a taxi booked.I need the taxi number and car type. Sentence9: My apologies, I actually do not need the hotel booked, but I do need a taxi to commute between the hotel and the restaurant, leaving the hotel at 23:45. Sentence10: Okay, thank you so much. Goodbye. Sentence11: Okay you're all set for a car. There will be a white Volkswagen taking you from the Gonville to Curry Garden, leaving the hotel at 23:45. Their contact number is 07462048280. Sentence12: Does one not have free internet? Sentence13: Goodbye! Have a great day! Sentence14: I would recommend The Curry Garden in the city center. Sentence15: We have a lot of them. Any specific location? Sentence16: Their address is 106 Regent Street City Centre and phone is 01223302330. Is there anything else you require? Sentence17: I have 14 restaurants that serve expensive indian food. Is there area of town you would like? Sentence18: An expensive Indian restaurant in the centre, I will require the address and phone number please. Sentence19: I'm not getting any results for those specific, do you want to try something else? Sentence20: I'm really looking for an Indian restaurant in the expensive price range in the town centre. What can you recommend? Sentence21: Hello, can you recommend an expensive restaurant in Cambridge? Sentence22: Can you please give me the day you are starting your stay, number of days, and the number of people staying? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User