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: Would you like me to book it for you? Sentence2: Somewhere in Cambridge, but I don't have a particular price range at this time. Sentence3: Thank you for using our service! Sentence4: TR8126 would leave at 15:01 and arrive at 17:44. Sentence5: That would be fine. I'll need to book it on Saturday for 5 nights and 3 people. Sentence6: I'm departing from Cambridge. I do need to arrive by 17:45 though. Sentence7: Sure, what is your departure information? Sentence8: How about the aylesbray lodge guest house? It's in the south and has free wifi AND free parking. Great deal! Sentence9: No thank you. I just need the departure time. Sentence10: What day were you looking to travel? Sentence11: Oh, silly me. Thursday, please. Sentence12: Can you help me find a guesthouse that has 4 stars? Sentence13: I've booked the lodge for you on Saturday for five nights and three people. Your reference is N7XG665B . Anything else? Sentence14: I could use some train information on a trip to Birmingham New Street. Sentence15: Thank you so much. That's all I need. Sentence16: Of course I would be pleased to help you with that. I have several options available, are you looking for a specific price range or location? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User