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: Okay Churchill College is free and their address is Storey's Way, their postcode is cb30ds and their phone number is 01223336233. Sentence2: When and where would you like to be picked up? Sentence3: What type of food would you like? Sentence4: I would like to know if there is an Italian restaurant nearby me. Sentence5: I am also looking for a restaurant. The restaurant should be in the moderate price range and should be in the same area as the attraction. Sentence6: how about you suggest one and book a table for 4 at 15:15 on wednesday, and I'll need the reference number too please Sentence7: Thank you for using our service today! Sentence8: I guess we don't need a restaurant after all. My husband isn't hungry. He wants to take a look at a college instead. Sentence9: Thats everything I needed thanks for the help! Sentence10: I'll also be needing a taxi to get me from the college to the restaurant. Sentence11: We have 15 italian restaurants. Let me find one close to you, what area are you in? Sentence12: I would like to find one in the west. Are there any in that area? Sentence13: I have a red audi and the contact number is 07674679354. Is there anything else I can assist you with today? Sentence14: The are five colleges in the west. Would you like to visit a free one or one with an entrance fee? Sentence15: Ok, I've booked you a table for 4 at Prezzo. Reference number is YXVRL9YK, and the table will be reserved for 15 minutes. Do you need anything else? Sentence16: I don't care, just need the postcode, phone number, and address. Sentence17: There are many colleges to choose from, which area of town are you interested in? Sentence18: From Churchill, and i want to get there by the time you booked my table. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User