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

Positive Example 1 -
Input: 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

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: Yes. I'd also like their phone number please. Sentence2: I would be happy to book TR2021 for you. The cost is 8.08 a ticket. How many tickets will you need? Sentence3: Would you like to book don pasquale pizzeria? It matches all of your latest criteria. Sentence4: Don Pasquale Pizzeria's phone number is 01223350106, what date, time, and number of people would you like to book? Sentence5: I'm looking for a restaurant the serves austrian food in the centre. Sentence6: Should I book this train for you? Sentence7: The 20:24 train from stansted arrives in cambridge at 20:52. It's a quick, 28-minute trip! Sentence8: I'm sorry, but no restaurants match your criteria. Would you like to broaden your search? Sentence9: You're welcome. Feel free to contact us again if you need any more information. Sentence10: There are 4 trains available one leaves at 20:24 would that work for you? Sentence11: Actually I need a train on Sunday, please. Sentence12: What about something in the expensive price range? Sentence13: The arrival time for TR2021 is 20:52. Sentence14: I will just need the arrival time please. Sentence15: What is the arrival time in Cambridge? Sentence16: That's actually all I need this afternoon. Thank you very much. Sentence17: The first train leaves from stansted airport on friday at 20:24. Would you like me to book it for you? Sentence18: Please book that train for me. Sentence19: What is the name of the stop where I need to get off for the restaurant? Sentence20: There are 33 expensive restaurants in the center of town, but no austrian ones. In fact, there are no austrian restaurants in all of cambridge. Sentence21: the train stop is cambridge. Sentence22: Ok, how about an expensive Italian restaurant around the centre? Sentence23: Alright, I have the earliest on Sunday leaving at 20:24 from Stansted Airport. Should I book this train for you? Sentence24: That's all the info I need on the pizzeria. I also need a train to leave after 20:15 and depart from stansted airport. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System