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: I have booked you one ticket to leave at 15:11 from kings lynn and arriving at cambridge at 15:58. Reference number is DLDQIR5G . Sentence2: Where would you like to depart from? Sentence3: Sure thing it's cb41uy. Sentence4: Can I have the postcode for that restaurant to please? Sentence5: That's all I needed today, have a good day. Sentence6: Your reference number is DOX6TU6M . You may pay 19.6 pounds at the station. Do you need help with anything else? Sentence7: I would recommend The Nirala. It is moderately priced and located on 7 milton road chesterton Sentence8: Actually I need a booking for 2 people total not just me. Sentence9: Yes, please make the booking for me. Sentence10: Thank you! So much. That's all I needed help with. Sentence11: Thank you for using the Cambridge TownInfo centre. We hope you have a pleasant visit. Sentence12: Yes I need a place to eat that is in the north and should serves indian food. Sentence13: There is a train leaving at 15:11 that will arrive at 15:58. Would you like assistance booking a ticket? Sentence14: I need a train leaving after 14:30 on Wednesday. Sentence15: you are welcome always Sentence16: Hi, I'm looking for a train to Kings Lynn from Cambridge. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User