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: Thank you for using our services. Enjoy your trip. Sentence2: I am looking for a restaurant in the expensive price range. Sentence3: No, that's all I need today. Thanks for your help! Sentence4: Sure thing it's booked, reference is 7QF5EFOW . Is there anything else you need help with today? Sentence5: I have several options for you. Do you prefer a specific type of food, or location? Sentence6: There are 110 different options. Might I suggest Kymmoy? The address is 52 Mill Road City Centre. The phone number is 01223311911. Sentence7: There are many restaurants that match your needs. Do you have any food preferences? Sentence8: Yes, that would definitely work for me. Thanks. Sentence9: I found 11trains, would a 13:11 departure work for you? Sentence10: No preference, just need the address and phone number of the restaurant. Also I am needing a train from Cambridge, nee to leave after 12:15. Sentence11: Would you like me to book that train for you? Sentence12: Yes please, can I get the reference number for 4 people Sentence13: That sounds good, thanks. I also need to get from cambridge to kings lynn on saturday. I can leave anytime after 12:15. Sentence14: I would like something in the center of town, please. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User