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: There are 2 options for guesthouses with 0 stars and free parking, the City Centre North B and B, and the El Shaddai Sentence2: I was able to book your party for a 3 day stay starting on Tuesday. Your reference number is TJ4K62L2 . Is there anything else I can help you with? Sentence3: Unfortunately, I do not have any matches for your request. Sentence4: TR1704 will have you there by 10:58. Would you like me to book that for you? Sentence5: Sorry, I'm afraid a different day wouldn't work, either. Perhaps you'd like a shorter stay? Sentence6: Yes, I also need a train leaving after 9:15 on Tuesday from Kings lynn to Cambridge. Sentence7: It doesn't matter. I just need to leave Kings Lynn after 9:15. Sentence8: How much will that cost me. I am on a budget. Sentence9: I am not particular about the area but it should be a hotel and 0 stars please. Sentence10: I'd like to book El Shaddai, 3 people for 4 nights, starting from Tuesday. Sentence11: You're welcome. Have a great day. Goodbye. Sentence12: 9.80 pounds. I can book that for you, if you like. Sentence13: Thank you but I will book it myself. This is all I needed, you were great thanks again!! Sentence14: How about a guesthouse with free parking and 0 stars? Sentence15: Let`s try the beginning of a different day than. Sentence16: How about 3 nights, then? Sentence17: There are 14 options. When would you like to arrive by? Sentence18: I have 29 results for places to stay with free parking, what area are you looking to stay in? Sentence19: Unfortunately, the hotel was unable to accommodate that stay. We can try fewer days, or beginning on a different day, if you like. Sentence20: Hi, I will be in Cambridge soon and need a place to stay that has free parking. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System