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: The one in the centre is fine, I would like a table for 1 at 14:15 friday please. Sentence2: No thanks. Instead, could you tell me where to get Thai food? Sentence3: Unfortunately, I don't have any places that serve tea that are expensive. Did you want me to try a different price range or type of cuisine served? Sentence4: I found two Thai restaurants one is in the west and one in centre. Which would you prefer? Sentence5: Thank you for contacting us. Have a good trip to cambridge. Sentence6: Your table is booked for Friday at 14:15 for 1 person. The reference number is KSS0DI7C . It is only reserved for 15 minutes so please arrive on time. Sentence7: Thank you very much. That is all I'll need today! Sentence8: For how many people? Sentence9: It is an expensive restaurant yes Sentence10: Great can I reserve that for 1 person at 14:15 on friday please? Sentence11: I am looking for a place to eat at that is expensive and serves food with afternoon tea. Sentence12: Can you make sure that's an expensive restaurant? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User