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, look it up and book me for Monday,please ? Sentence2: I was unable to book for that time, would you like to try something else? Sentence3: Can you check to see if they have booking available for 8 people at 19:45 on Sunday? Sentence4: Yes, Indian please. Sentence5: I have 9 restaurants that meet that criteria. Do you have a preference on type of cuisine? Sentence6: There are five Indian restaurants in the west in the expensive range. May I recommend Tandoori Palace? Sentence7: Booked at cocum. Your table will be reserved for 15 minutes. Reference number: 4FEC5K00 . Anything else? Sentence8: Please book any Indian restaurant in the same area and price range as Tandoori Palace. This is for 8 people at 19:45 on sunday. Sentence9: Let us know if you need anything else, good day. Sentence10: The booking was unsuccessful. Is there another time you would prefer? Sentence11: That is it. Thank you for your help. Good bye. Sentence12: Yes, I need some help looking for a restaurant. The restaurant should be located in the west, and the food should be in the more expensive price range if at possible. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User