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: TR4800 leaves at 07:54 and arrives in Cambridge by 08:43, would you like to book a seat? Sentence2: Will you also check the hotel called Lovell lodge? Sentence3: I am looking for a train that'll leave on friday. Sentence4: Yes can you make me a booking for 8 people? Sentence5: I was able to book that room for you, ref #8XZZ0TYE . Can I help you with anything else? Sentence6: Booking was successful, the total fee is 102.4 GBP payable at the station. Your reference number is 0B1WJ9DR . Will that be all? Sentence7: You're welcome! Have a great day. Sentence8: Great I also need the lovell lodge for 8 people for 2 nights starting wednesday. Sentence9: I'm going to Stevenage from Cambridge. I need to arrive by 09:15. Thanks for your help! Sentence10: I'm sorry, I had to re-book your train, as I had the stations backwards. TR2515 will get you to Stevenage by 6:10. Fee is 102.4 GBP, REF. #N3H045K3 . Sentence11: We have over 400 results. Can you provide me with more information, such as departure site and destination? Sentence12: That is all, you were very helpful. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System