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: I am looking for a guesthouse to stay at that has a 4 star rating. Can you help me? Sentence2: May I have the reference number for that booking? Sentence3: Yes, can you book it please? Sentence4: That'll aboutdo it, thanks a bunch. Sentence5: I will need picked up from the hotel and go to the restaurant. Sentence6: La Margherita fits those specifications. Would you like to book a table? Sentence7: No. But I would like a cheap guesthouse. Sentence8: You are all booked with a taxi. Sentence9: I would like to check in on Thursday and stay for 3 nights. I need to book a room for 6 people. Sentence10: I have several options for you. Is there a particular area you're looking for? Sentence11: Your reference number is 4NG5RGOI . Do you need anything else? Sentence12: Great. I also will need a taxi. Sentence13: I was able to book that for you. Here is your reference number 5JJ8331T . Sentence14: Yes, I need a table for 6 on Thursday. We'd like it at 14:15, please Sentence15: Thank you may I have the contact number and car type please. Sentence16: Booked car type : red lexus Contact number : 07350632245 Sentence17: Yes please, can you help me me find an Italian restaurant in the west that is cheap? Sentence18: Where would you like to be picked up and drop off? Sentence19: I would be happy to! Which day, how many people, and how many days? Sentence20: You are welcome, have a great night. Sentence21: Would you like to try Alexander Bed and Breakfast? Sentence22: I've booked it! You'll be at alexander b&b starting Thursday for 6 people for 3 nights. Is there anything else I can help you with? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User