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 have 9 to choose from. What price range would you like? Sentence2: I will be departing from stansted airport and I want to leave on thursday Sentence3: I'm going to Cambridge and I need a train that arrives by 16:00. Sentence4: Thank you. I'm also looking for a restaurant that serves northern european food in the centre. Sentence5: Thank you goodbye. Sentence6: May I look anything else up for you? Sentence7: Booking was successful. Reference number is : BE27DMZM . Sentence8: I have made the train reservations your reference number is HHQDGA03 . Sentence9: Where will you be departing from and what time will you be leaving? Sentence10: Probably cheap would be best Sentence11: How many tickets would you like me to book for you? Sentence12: Thanks for your help! That is all I needed today. Sentence13: Can you pick one for me? Sentence14: That is all I need today good bye. Sentence15: I have several options what price range were you looking for? Sentence16: Absolutely! I really enjoy Zizzi cambridge. Would you like me to make a reservation there for you? Sentence17: I'm sorry, I was mistaken. I do not have a Northern European restaurant in the centre of town. Sentence18: i want to book for six people. i also want a restaurant. The restaurant should serve northern european food and should be in the centre Sentence19: Sure. Sounds good. I need to book it for the same group of people on the same day at 20:15. Can I please have the reference number as well? Sentence20: How about northern european? Sentence21: Okay, how about italian food? Sentence22: There are several to choose from. There's Pizze Hut City Centre, Ask, and also Zizzi Cambridge. Does one of those sound good? Sentence23: OK, the TR3076 train arrives at 15:52. Would you like to book that one or consider other options? Sentence24: Yeah, book that one. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User