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: Please book a taxi between All Saints Church and pizza express, I'd like to leave the church by 21:45. Sentence2: I'll think about it, thank you. Could you reccommend a few attractions in the same area of town? Sentence3: I need an italian place in the moderate price range to eat at. Sentence4: Yes, both Pizza Express locations are in the centre. Would you like more information? Sentence5: Choose one of them for me and let me know the phone number, address, and postcode please. Sentence6: Okay that's all I need for now. Thank you. Sentence7: OK, there are two Pizza Huts, two Pizza Expresses, and a Prezzo. Sentence8: We have 5 options available that meet that criteria. Is there a specific area you would like? Sentence9: In the centre are the All Saints Church postcode cb58bs, the entrance is free. Also, the Great Saint Mary's Church postcode cb23pq entrance fee 2 pounds. Sentence10: Great! Thank you for using our services! Sentence11: Okay your contact number is 07950726501 Your car is a grey bmw. Sentence12: Are any of those options located in the centre of town? Sentence13: Yes, I like you to tell me all 5 options,than I will decide! Sentence14: Sure, pizza express Regent Street City Centre cb21db, 01223324033. Would you like to book a table there? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System