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 don't need to book, but could you tell me the total travel time, please? Sentence2: We don't have any moderately priced vegetarian places in town. Would you like to try a different type of food or a different price range? Sentence3: I have two - both in centre. The varsity Resturant and Bloomsbury. Would you like to book one? Sentence4: Please book for 6 people at 17:00 on Thursday. I'd also like the reference number. Sentence5: I'm also looking for a train. It should depart cambridge and go to stansted airport on thursday. Arrive by 17:00. Sentence6: Okay, what about international food? Sentence7: Unfortunately no, it has to be vegetarian, so i will have to make my own accommodations, thanks. Sentence8: No, I think that should be all for me today. Thank you so much, you've been very helpful! Sentence9: Your table was booked. Your reference number is MLK7FV6P . Sentence10: There are no vegetarian options in the area. Sentence11: I need to find a moderately priced vegetarian restaurant. Sentence12: You're welcome, have a great day! Sentence13: Would you be interested in TR9427? It arrives at 16:08 and departs at 15:40. Sentence14: That would be just fine. Sentence15: Sure thing. Travel time is 28 minutes. Can I help you with anything else? Sentence16: Make a reservation at Bloomsbury please, for Thursday night. Sentence17: How many tickets would you like to book? Sentence18: What time do you want to dine and how many people in your party? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User