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: Graffiti is in the west area. Would you like me to see what is available in the east area? Sentence2: yes, I would prefer it to be in the west area. Sentence3: Okay. There is one option here for you. It is grafton hotel restaurant. Do you need a reservation? Sentence4: I need more information, such as when you would like to book it and for how many people? Sentence5: I would also like to get some expensive fusion food. Sentence6: What area would you like that in? Sentence7: Graffiti serves British food in the west area, are you ready to make a reservation? Sentence8: I am looking for a place to stay with free wifi. Sentence9: I need a restaurant in the east area, so that won't work. Sentence10: Yes please. Go ahead and book it for me. Thank you and good bye Sentence11: In the east side of town. Sentence12: How about a British restaurant instead? Sentence13: How about travellers rest restaurant located in the west side of town? Sentence14: We have 7 options that meet your criteria. Do you have a specific price range in mind or would you like a recommendation? Sentence15: The address is 138 perne road Sentence16: Not really, but can you give me the address for your favorite place? Sentence17: Is Graffiti in the same area as my hotel? I'd like to keep it to that area if possible. Sentence18: I prefer the Carolina Bed and Breakfast. It's a 4 star guesthouse in the moderate price range. Would you like for me to book a room for you? Sentence19: I'm sorry, I was confused. I need a british restaurant in the east side. Sounds like Graffiti won't work for me. Sentence20: There is nothing that meets that criteria, shall I run another search? Sentence21: Possibly, but first can you give me the exact address for Graffiti? Sentence22: Could you just give me the address for now? Sentence23: There are 6 to choose from. Do you have a preference for area? If not, then I recommend graffiti. Sentence24: Sure they are located at Hotel Felix Whitehouse Lane Huntington Road, is there anything else I can help you with? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System