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: Sure, try 17:30. Sentence2: No that will be all. Sentence3: We have four cheap Chinese restaurants. Are you interested in the south or centre area? Sentence4: The golden house is a cheap chinese restaurant in the center area. Would you like me to reserve a table for you? Sentence5: I'm so sorry but there doesn't seem to be any restaurants in the city that offer austrian food. Can I look for another cuisine style for you? Sentence6: Ok, how about a cheap Chinese restaurant? Sentence7: I am interested in the centre area. Sentence8: Darn, I was really hoping to find a cheap Austrian restaurant. Would you mind checking one more time? Sentence9: Could you help me find an Austrian restaurant please? Sentence10: I'm sorry but there are no Austrian restaurants. Is there another type that might interest you? Sentence11: Yes, that would be great. I'd like a table for 3 on Saturday at 18:30. Sentence12: I was able to make your reservation for 17:30. Your reference number is VGGQ2AP9 . Is there anything else I can help you with? Sentence13: There doesn't seem to be any availability for Saturday at 18:30. Does another time or day work for you? Sentence14: Excellent. Have a good rest of your day. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System