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: Your booking is a success. Your reference number is: HHCGQ5HZ . Yes, it does have internet. Sentence2: Booking was successful, the total fee is 151.19 GBP payable at the station, your reference number is YYKJRD9R . Will that be all? Sentence3: TR6678 departs from Leicester at 10:09 on Saturday. Shall I book that for you? Sentence4: Help me find a train that leaves after 09:45 on Saturday. Sentence5: There are three guesthouses that meet your criteria. I would recommend the Autumn House. Would you like me to book a room for you? Sentence6: Yes please make a booking for 5 people. Sentence7: does it have free wifi and parking? Sentence8: Okay would you be able to make a reservation for me for 4 nights for 5 people starting Saturday? Sentence9: Thank you. I am also looking for a place to stay. It needs to be cheap and in the east. Sentence10: The TR5170 departs at 11:00. Would that work? Sentence11: Does it depart from Leicester? Sentence12: It sure does. Can I get you more information? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User