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: How about some Italian food in the West? There are two restaurants we can try. Sentence2: book it for 3 people and 5 nights for monday. Sentence3: Are there any Eritrean restaurants in the east instead? Sentence4: I have booked a table for 3 for Monday at 16:00 at Pizza Hut Fen Ditton. Sentence5: There is one Italian restaurant in the East. It is moderately priced. It is located in Cambridge Retail Park. Sentence6: Ok great. Can you book a table for 3 at 16:00 on Monday? Sentence7: I just booked it for you. Your reference number is 3P75NAMG . Is there anything else I can do for you? Sentence8: I am sorry, there are no Eritrean restaurants in the East either. Would you care for another type of cuisine? Sentence9: I'm afraid there are no eritrean restaurants in the area. Would you like to try a different cuisine? Sentence10: Yes, I am looking for a restaurant that serves Eritrean food. Sentence11: That would work, I need to get a table the same day as my other booking. Sentence12: Thank you for your help, have a great evening. Sentence13: Let's try Italian food. Sentence14: I need to find out information about a particular hotel called warkworth house Sentence15: Okay should we try a different restaurant then...? I've never had this problem before... Sentence16: It has some great reviews. It is a 4 star moderate located on Warkworth Terrace. What else would you like to know? Sentence17: Booking was successful. Reference number is : 3P75NAMG . Sentence18: Okay, maybe try it again for Wednesday? Sentence19: May I have the reference number please ? Sentence20: How about wednesday? Sentence21: I am not showing that you were booked and I am having trouble booking this for you. Do you have other choices ? Sentence22: Unfortunately, the restaurant can't accomodate you. Sentence23: I do apologize, but it seems like I'm having trouble booking this for you at this time. Sentence24: You are welcome and you do the same .Goodbye Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System