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: Yes, I'm also looking for a 4 star hotel, in any area, that includes free parking. Sentence2: No, I just need the price. Sentence3: That is no problem, you are looking at 14.32 pounds per person if you decided to go that route. Can I help with anything else? Sentence4: Sure, you have a time you want to depart or arrive by? Sentence5: I'm looking for a train going to broxbourne leaving on saturday. Sentence6: I have the TR5688 that will get you in at 18:01. Would you like to book it? Sentence7: Great thank you, that is all I need for now. Sentence8: Yes, I need to arrive in Broxbourne by 18:15. Sentence9: I have three hotels that match your criteria. Two are expensive and one is cheap. Do you have a preference of price? Sentence10: I don't have a preference of price but I'd like for it to be a guesthouse in the north. Sentence11: I have 7 great guesthouses in the north. May I suggest the kirkwood house? Sentence12: Okay I have your reference number and it is 8XF57Q08 . Sentence13: Sure, I'll try Kirkwood House. Make me a booking for 5 nights for a party of 5, checking in on Monday Sentence14: Thank you for using the Cambridge Town Info Centre Services. I hope you enjoy your time in Cambridge! Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User