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'm sorry. I don't have any expensive Indian restaurants either. Would you be willing to try another price range or area? Sentence2: Yes, I'd like a place in the north with a 4 star rating including free wifi please. Sentence3: There are no hotels in that area with free wifi, can I look up a different area or guesthouse? Sentence4: Yes, the Avalon is exactly what you're looking for. It offers internet (but no parking). Would you like me to book a room for you? Sentence5: I'm sorry that area doesn't have anything matching those criteria. May I try another area? Sentence6: And the Avalon is in what part of town? Sentence7: Your welcome. It has been a pleasure assisting you today. Have a wonderful day. Sentence8: I'm looking for a hotel in the north part of town with free wifi. Sentence9: What about Indian food? Sentence10: Is there a guesthouse? Sentence11: Can I help you with any thing else? Sentence12: Avalon is in the north. Can I book you a room? Sentence13: No thanks can I just have the address and postcode? I also need help finding a restaurant. Sentence14: Okay, thank you. Sentence15: The address is 62 gilbert road and the post code is cb43pd. Sentence16: There are no romanian places at any price range there, but we have 5 expensive restaurants, shalI run another search? Sentence17: No thank you that will be all Sentence18: Yes I need a romanian place to eat in the same area, please make sure it's expensive. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System