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: Thank you but I also need a train that is going to leicester and should depart from cambridge Sentence2: Okay. I have a booking and reference number for you. It is YE2KMQB2 . Sentence3: Yes please give me the reference number Sentence4: Just for myself, please. Sentence5: Actually, I won't need you to book tickets. But can I please get the price and travel time for TR1755? Sentence6: Hi, I'm looking for a moderate restaurant in the centre. What would you recommend? Sentence7: I found few restaurant that serve Asian and British food which food you prefer? Sentence8: Okay, I have booked you a table at Yippee Noodle Bar. Your reference number is OWLN59MN . Sentence9: ok that would work go ahead and book that Sentence10: Thank you for using our service have a great day. Sentence11: How many tickets would you need? Sentence12: I will be traveling on Thursday and I need the train to arrive by 12:00. Sentence13: Lets go with Asian. Can you book a table for 7 at 12:00 on Wednesday? Sentence14: Sure thing - what day are you traveling, and at what time? Sentence15: Oops, I actually didn't want tickets just yet, but I guess I'm stuck with them! Thanks for your help anyway, totally my fault. Sentence16: How many seats will you need? Sentence17: The travel time is 105 minutes and costs 37.80 pounds. Sentence18: TR1755 arrives in leicester at 11:06. Would you like tickets on that train? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User