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: Your booking has been successful. You will take the TR5060 at 11:48 and arrive at 12:38. Your fees are 99 GBP which you can pay at the station. FDPK5M0M Sentence2: Yes, there are many trains leaving Peterborough on Tuesday, what are your arrival and departure times? Sentence3: what about graffiti? it looks lovely Sentence4: I'd like to arrive by 13:00. I'd also like to book seats for 6 people. Can you provide a reference number please? Sentence5: Are there trains leaving from Peterborough on Tuesday? Sentence6: I am looking for information in Cambridge. Sentence7: Yes I am also looking for an expensive restaurant on the west side. Sentence8: Grand. Please can you give me the postcode and phone? Sentence9: No, that will be all. Thank you for your help! Sentence10: Thank you for calling. Have a fantastic trip! Goodbye! Sentence11: Sure, what can I help you with? Sentence12: 01223277977 is the phone number. cb30lx is the postcode. Can I help you with anything else? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User