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: TR0768 leaves at 19:40, arrives by 20:08. The duration is 28 minutes. Is there anything else? Sentence2: I'd like to book the Alexander B and B for 6 people, 5 nights, and starts on Thursday. Can I have a reference number, please? Sentence3: I'm also looking for a train on tuesday and leaving after 19:30 Sentence4: Yes, alexander bed and breakfast is a guesthouse located in the centre. It is in the cheap price range. Is there anything else you need to know? Sentence5: TR0768 leaves at 19:40. Does that work for you? Sentence6: I can look into that for you - where would you like to go? Sentence7: Where I'd like to go is probably different than where I have to go, but I plan on going to stansted airport. Sentence8: No. I am all set. Sentence9: What is the travel time? Sentence10: Have a great day then! Sentence11: i'm looking for a hotel called alexander bed and breakfast Sentence12: Done! Your reference number is 45NR6JNN . Do you need help with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System