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: What day would you like to travel? Sentence2: Yes, go ahead and book either of those for 2 people and 3 nights beginning on Tuesday. Sentence3: Can you also recommend a three star hotel that has free wifi? Sentence4: Your booking at The Gonville coming in on Tuesday for 4 days 3 nights is confirmed for a party of 2. Your reference number is : 5GCUETMP . Anything else today? Sentence5: I need a train leaving from broxbourne. Sentence6: There are two. The Gonville Hotel and The Lensfield. Both also have free parking. Would you like me to book one for you? Sentence7: Booking was successful, the total fee is 17.89 GBP payable at the station .Reference number is : X1XG5K91 . Sentence8: I am happy to help! Goodbye, I hope your trip is lovely! Sentence9: Can you book it for me? Sentence10: No. That's it. Thank you for your help. Sentence11: I would recommend TR6788 which leaves Broxbourne at 19:32 and arrives in Cambridge at 20:32. Sentence12: I would like to travel on a Tuesday from Broxbourne to Cambridge after 19:15. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System