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: Booking has been completed! Your reference# is D6V5M769 . The total is 79.67 GBP, payable at the station. Can I help you with anything else? Sentence2: Is there a reference number for the hotel? I also need a train to london liverpool street. Can you help with that too? Sentence3: Yes please, for 6 people. Sentence4: I'm planning a trip with an Arthurian theme. I've heard there's a hotel called Avalon there in Cambridge. Is that right? Sentence5: Actually, can you book 6 people for 3 nights starting on wednesday? Sentence6: Your Reference number is : EHNOQL7E . I can help with the train as well. Can you give me a little more information on your trip? Sentence7: You are welcome. Have a nice time in Cambridge. Bye. Sentence8: You're all booked. Sentence9: Yes there is a guesthouse called avalon. Would you like any more information on that? Sentence10: That's all I need for today. Thanks! Sentence11: I need to get to liverpool st on saturday, but I can't leave cambridge until after 13:45 Sentence12: TR4466 leaves at 13:59 and arrives at 15:27. Would you like me to book it? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System