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 please. I am also looking for a place to dine; european modern food, but at a moderate price. Sentence2: What time would you like the reservation, and for how many people? Sentence3: You're all set, reference #MEGKPAR1 . Can I help you with anything else? Sentence4: chinese, indian or italian food? Sentence5: Have a great day. Sentence6: Sure I have 4. When are you coming? Sentence7: Im feeling modern european what are some of my options for that? Sentence8: I would like the reservation to be at 12:45 for 7 people. Sentence9: Great, and what day do you prefer? Sentence10: Can you help me find a place to stay in the south part of the City that offers free wifi with the room. Sentence11: Is there a certain area you prefer? Sentence12: I'm not sure yet. What types of hotels are available? I don't want to stay in a guesthouse. Sentence13: I would prefer for it to be Thursday. Sentence14: I would like a table. Sentence15: What is the star rating of the lensfield? Sentence16: the lensfield hotel is in the expensive price range. their address is 53-57 lensfield road Sentence17: No, that is all for now. Sentence18: The only place on the south side is the restaurant alimentum. Are you interested in booking a table with them? Sentence19: The Lensfield Hotel has 3 stars. Would you like their phone number? Sentence20: Yes, I would like a restaurant that is also in the south. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User