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: Any one will do as long as it has a 4-star rating with free wifi and is cheap. Sentence2: Hi, I'm looking for a 4-star hotel with free wifi. Sentence3: No I am sorry, they are both in the moderate price range. Would you like to book one of them? Sentence4: Okay, I've made your reservation. The reference number is 525A3U0N . What else can I help you with today? Sentence5: I'm not sure. I really needed those specifications. Sentence6: I apologize, we have several options. The alexander bed and breakfast is a cheap four star guesthouse, in the north area, with wifi. Would you care to reserve a room? Sentence7: Are either of those two cheap? Sentence8: You've taken care of everything. Thank you. Sentence9: Sure thing. I have two options for you, and they are both guesthouses. One in the east, and one in the north. Do you have a preference? Sentence10: Yes, let's book it for 3 nights from Wednesday. There will be 5 of us. Sentence11: Thank you have a good day. Sentence12: There are no 4-star places that are cheap and have free wifi. Perhaps something not as fancy, or in a higher price range? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System