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: That's it for now, thank you so much. Sentence2: Sorry, that booking is unavailable. Perhaps another day or a shorter stay would work for you? Sentence3: There are 24 places available, Acorn Guest House has good ratings Sentence4: I'm looking for a guesthouse to stay in. I don't care about parking, though. Sentence5: Can you suggest another place, is there a hotel with 4 stars in that area? Sentence6: Okay, how about the a and b guest house? If fits everything you need. Sentence7: Yes. I want to book one for 5 people and 2 nights starting from saturday. Sentence8: Actually the A & B Guesthouse just opened up for Saturday. Your reference number is GM77DLR6 . Can I further assist you? Sentence9: Perfect! Let's book it for two nights starting Saturday. There are five people in my party. I will also need the reference number. Sentence10: I'm sorry but there are no 4 star hotels in the east, but there are quite a few 4 star guesthouses. Would one of those interest you? Sentence11: You're welcome, Thank you, goodbye. Sentence12: I ant a place with a rating of at least 4 stars, a guesthouse, in the east, and I don't need free parking. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System