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: Thanks for the information! Sentence2: Could you tell me if you have a 5 star hotel on the south side? Sentence3: That should be all, thank you. Sentence4: It really needs to be in the south and have a 5 star rating. It can be a hotel or guesthouse though. Sentence5: Yeah, that would be fine. Sentence6: I'm sorry but there are no hotels are guesthouses with a 5 star rating in the south. Would you like to try a 4 star rating instead? Sentence7: Do either of them have internet? I'll also take the address for both. Sentence8: You are welcome, do you need any thing else? Sentence9: You are welcome. Thank you for calling Cambridge TownInfo Centre. Goodbye. Sentence10: Unfortunately, I don't happen to have anything that meets your specifications. Can I look in another area for you? Sentence11: We have 2 guesthouses that match your needs. aylesbray lodge guest house or rosa's bed and breakfast. Does either of these fancy your interest? Sentence12: Yes, they both do. Aylesbray is at 5 Mowbray Road, and Rosa's is located at 53 Roseford Road. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User