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: Okay great! Glad I could help. Sentence2: I have 19 trains going from Cambridge to Leicester on Thursday. What time would you like to arrive by? Sentence3: I also need a place to stay in the north area. Sentence4: There are no trains that leave after 12:15. Sentence5: I was able to book you a room for 2 at city centre north b and b, the reference number is 57F4S22N . Do you need any more assistance? Sentence6: No, that's all I need for right now. Thanks for the assistance! Sentence7: It don't matter as long as it is cheap. I need it for 6 people for 2 nights starting tuesday Sentence8: Okay, do you have any other suggestions? Sentence9: I will be traveling on thursday. Sentence10: I believe that the TR0822 leaving 12:15 would be great for you. Should I make a booking for you? Sentence11: I would love to leave after 12:15 please. Sentence12: Please assist me in finding a train going to leicester from cambridge. Sentence13: Would you like a guesthouse or a hotel? Sentence14: Okay. What day would you like to travel? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System