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 would like to find a guesthouse with a 4 star rating. Sentence2: OK, I was able to get the reservation for you. The reference number is I36DJXLT . Can I help you with anything else? Sentence3: You're very welcome, have a great day! Enjoy Cambridge! Sentence4: Yes, for the same group of people on Monday at 17:15, please. Sentence5: I have a table reserved for you, they'll hold it for 15 minutes. The reference number is WU3RYCER . Can I help you with anything else? Sentence6: Would it be possible for you to book another day? Sentence7: The alexander bed and breakfast would fit your needs would you like me to make a reservation for you Sentence8: I'd like Italian food, please. Sentence9: There is a Pizza Express in the centre that is moderately priced. Would you like to book there? Sentence10: YES I NEED IT FOR 3 PEOPLE FOR 2 NIGHT STARTING MONDAY AND I NEED THE REFERENCE NUMBER Sentence11: Find a restaurant in the centre that's the same price range as the hotel, please. Sentence12: Hello. I'd like to find a hotel to stay in for the weekend. I'd like one with restaurants and entertainment within walking distance. Sentence13: I found over 20 choices. Is there a certain type of food you're interested in? Sentence14: No, thank you for your help. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User