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, internet is available. Sentence2: Thanks, that's all I need. Have a nice day. Sentence3: Great I also am looking for a place to stay with free parking in the south part of town too. Sentence4: Have a great day too. Goodbye. Sentence5: Which one would you recommend? I don't need a reservation, just the address and phone number. Sentence6: Do they also have internet available? Sentence7: I have two, how many will be dining with you? Sentence8: I'm looking for a restaurant that is high end chinese. Sentence9: I recommend the peking restaurant the phone number is 01223354755 and there address is 10 Homerton Street City Centre. Is there anything else you need? Sentence10: I've found 9 high end chinese restaurants. Is there an area you prefer? Sentence11: Sure I have several choices for you. Do you have a price range preference? Sentence12: Goodbye! I hope your day is great. Sentence13: Yes, I'd like it to be in the south. Sentence14: I found one hotel, The Lensfield Hotel. Would you like to make a reservation? Sentence15: I would like it to be in the expensive price range. Sentence16: Okay great. Thanks I will. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User