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 can help you with trains. Where are you departing from? Sentence2: There are 5 locations. Did you have a preferred area of town? Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : LTN9KTVQ . Anything else I can help you with? Sentence4: Yes. Can you book a single ticket for me? Sentence5: The restaurant should be in the centre Sentence6: I'm looking for information on train times, can you help? Sentence7: You're welcome, have a great day! Sentence8: TR1342 leaves at 16:42 would that work for you? Sentence9: I'll be leaving Stansted Airport to Cambridge after 16:15 on Wednesday. Sentence10: That'll be all, thank you! Sentence11: i recommend cafe uno. can i book for you? Sentence12: Yes, I need a place to have dinner. I'm thinking italian and expensive. Sentence13: Booking was successful, the total fee is 10.1 GBP payable at the station .Reference number is : 8MKSM72E . have you anything else i can help? Sentence14: Yes. Book for 1 at 20:15. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System