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: Sure. Acorn Guest House is on 154 Chesterton Road. Can I help you with anything else? Sentence2: I need a moderate place to eat, same area as my hotel. Sentence3: Could I please have the address? Sentence4: There is a Chinese restaurant, as well as an Indian restaurant, in that area. Which do you prefer? Sentence5: You're welcome. Good-bye. Sentence6: Can I have the address for the Indian restaurant? Sentence7: I have several guesthouses available. Would the acorn guest house work for you? Sentence8: The address for the Indian restaurant is 7 Milton Road Chesterton. Do you need anything else? Sentence9: Does that have free wifi? Sentence10: No, that is all I need today. Thank you for all your help! Sentence11: Yes, they offer free internet and parking. Would you like to book a room? Sentence12: The address for the Golden Wok Chinese restaurant is 191 Histon Road Chesterton. Is there anything else I can help you with? Sentence13: Can I have the address for the Chinese place? Sentence14: Hello, I need to find a place to stay for the night. I'd rather be in the north than the city centre, and I'm willing to pay a moderate sum. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System