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: I have located several options for you. All trains cost 13.20 pounds and 50 minutes long. Trains leave from 7:48 to 10:19 for arrival by 11:30. Do you have a preference? Sentence2: Sure. What day and time would you like? Sentence3: Thank you, have a nice day. Sentence4: Are either of those in the centre of town? Sentence5: I need a train departing from Peterborough on the same day as the restaurant booking. Sentence6: I prefer the 10:19 train please. thank you. Sentence7: You're most welcome. Sentence8: Hi, I'm trying to find a moderate turkish place to eat at. Is there anything like that? Sentence9: Yes, they both are. Sentence10: Your table has been reserved and will be held for 15 minutes. Your reference number is N25GQTNZ . Can I help with anything else today? Sentence11: Okay. Can you book me a table for 4 at the Anatolia? Sentence12: I need it for Saturday at 14:15. Sentence13: Great. I was able to book you into that seat and your reference number is UCWR9ZCJ . Sentence14: There are lots to choose from. What time would you like to arrive or depart by? Sentence15: I want to arrive by 11:30. Departure time doesn't matter, but I'd like to know what time. Sentence16: There are two restaurants that fit your criteria. The Anatolia and the Efes Restaurant. Which one do you prefer? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System