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 places that fit that description all over town, except in the north. If area is no concern, I recommend the Gonville in the center of town. Sentence2: Yes, it is! Anything else needed? Sentence3: Okay well now I need to get a taxi to leave the hotel by 17:45 to the attraction. I will need a contact number and car type. Sentence4: That's a lot of choices, how about nightclubs? Can you get me a couple of phone numbers for good ones? I'm hoping to catch DJ Squalour from Ibiza! Sentence5: I'm looking for a places to go and see during my upcoming trip to Cambridge. Sentence6: No, it only 3 stars. The Huntington Marriott is 4 stars though. It is also expensive and has free parking and internet. Sentence7: No that is it. Thank you! Sentence8: I would like to go to the south area please. Sentence9: you are welcome. enjoy your stay. Sentence10: Is it four star? Sentence11: Booking completed! Booked car type : red lexus Contact number : 07421633218 Sentence12: Yes, I would like an expensive hotel with free parking. Sentence13: I want to confirm that the booked red Lexus is a taxi, as I previously requested? Sentence14: The only nightclub in the south is called the place on 22 sidney street. Phone number is 01223324600. Can I help you with anything else? Sentence15: What area of town would you like? Sentence16: On the south side, your options are the cinema, entertainment venues, museums, nightclubs, parks, and a theatre. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System