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 was able to book train TR0677 and you reference number is 6VAA5F0P . Sentence2: I would like a hotel in the north that has free parking. It doesn't need to have internet. Sentence3: Yes. Please choose the first available train and book it for 6 people. Then give me the reference number Sentence4: Hi, I'm looking for a place to stay while I'm in town. Can you assist me? Sentence5: I also need a Wednesday train to Cambridge. Sentence6: Thank you. That is all I need for now. Sentence7: I have found several trains to Cambridge. Where will you be departing from? Sentence8: what kind of place are you looking for? area? Sentence9: Have a wonderful trip. Sentence10: 15 trains match your needs. Do you want to complete a booking? Sentence11: Okay, I recommend the Acorn Guest House. Would you like to book a room? Sentence12: Is there a certain time you are wanting to leave? Sentence13: Actually I am departing from Cambridge and going to Leicester. Sentence14: I need it to arrive by 21:00. Sentence15: Booking for 1 night for 1 person from monday was successful. Your reference number is D3MYG9R0 . Can I assist with anything else, restaurant, attractions? Sentence16: Yes, please book the room and can I have the reference number Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System