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: Sounds good. Please make a reservation for 3 next Wednesday at 14:15. I would like a reference number. Sentence2: Since I like Chinese food, could you see if any restaurants serve both Thai and Chinese food? Sentence3: Lets go with chinese food. He likes chinese just as much. Can you recommend one in the centre? Sentence4: Could you recommend an expensive restaurant in the city centre? Sentence5: I cant get you a table there. How about tang chinese instead. Your reference number is SAG9PAI9 . They have better food. Sentence6: I apologize I do not have any listed that serve both cuisines. Would you prefer one type of food? Sentence7: You're welcome! Have a great day! Sentence8: I can book a table at bangkok city for 2 when would you like the reservation? Sentence9: It's for my friend's birthday and he really likes Thai food. Sentence10: That is fine. Thank you. Sentence11: I show several restaurants in the City Centre. If you could perhaps indicate what type of food you would like it would narrow my search further. Sentence12: I have the ugly duckling in the centre. Would you like to make a reservation there? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User