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 there are 5 parks to visit, would you prefer one in the north, south, east, or in town centre? Sentence2: You're welcome. Goodbye. Sentence3: I'm sorry, there are no Romanian restaurants in the centre. Care to try a different cuisine? Sentence4: Nope, that's all I need. Thanks a bunch! Sentence5: Could I please have the postcode and area to Milton County Park? Sentence6: The contact number for the taxi is 07629467335. Would you like help with anything else? Sentence7: Yes, I would like their contact number please. Sentence8: Milton County Park in the north is free and my humble suggestion. Sentence9: The postcode is cb46az and the area is north. Sentence10: I just need to be leaving the restaurant by 06:15. Sentence11: Are there any restaurants that serve Romanian food in the centre of town? Sentence12: There are 5 restaurants that serve indian food in the centre. Any specific price range? Sentence13: Please I want to book an expensive restaurant. First however help me find a place to go in town. Is there a nice park? Sentence14: Yes, do you have a time in mind? Sentence15: Any of the restaurants is fine. But, can I get a postcode and price range for the one you choose please. Sentence16: I have successfully booked you a White Audi. Would you like their contact number? Sentence17: The Golden Curry is expensive and delicious. The postcode is cb12az. Would you like me to make a reservation? Sentence18: It doesn't really matter, just whatever you recommend. Sentence19: No, thank you. But can you book a taxi from the restaurant to the park? Sentence20: What about Indian food? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User