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: We have 2 of those. Would you like a guesthouse in the north or centre? Sentence2: I would like a guesthouse in the north please. Can you check if it has free parking? Sentence3: Your booking was successful, the total fee is 51.2GBP, payable at the station. Reference number is YSJ6ZWYT . Anything else I can help you with today? Sentence4: I would prefer a guest house if any 0 stars are available. Sentence5: Leaving Cambridge and headed to Stevenage, please. Sentence6: You're very welcome! Have a great day! Sentence7: I have a 15:21 or a 17:21 train, arriving 49 minutes later at 16:10 or 18:10, respectively. Would you like me to book one for you? Sentence8: Where will you be departing from, and what is your destination? Sentence9: Yes. The 17:21 would be perfect. Please book it for 4 people. Sentence10: Our cheap zero star guesthouse in the north has both free wifi and free parking. Would you like to book? Sentence11: I need a hotel with free wifi. I'm broke, though, so find me a 0-star hole in the wall. Sentence12: Not right now. Thank you. I am also looking for a train that leaves on Monday and arrives by 1830. Sentence13: No, that's all I needed. Thank you. Sentence14: There are three 0 star hotels, both city centre north b and b, and el shaddai are cheap, and cityroomz is moderate. Which would you like? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System