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: That is all I needed, good day to you. Sentence2: Yes, I'm also looking for a train departing from Cambridge and heading to Stansted Airport. Can you please help? Sentence3: Can you help me find a nice 4 star hotel? Sentence4: Which day & what time are you heading to the airport? Sentence5: There are 15 trains available. Should I book a train for you? Sentence6: I have two hotels available one in the west and one in the centre. Do you have a preference? Sentence7: Yes, please choose the earliest one after 09:30 and book it for 7 people. And don't forget to send the reference number! Sentence8: I want a train for tuesday that departs after 09:30 Sentence9: Yes, I do. I would like a hotel that is expensive in price. Sentence10: I would love to! Do you have a price range in mind? Sentence11: You're welcome. Have a nice day! Sentence12: The one in the centre would be ideal. There will be 7 people staying for 2 nights, starting Tuesday. Sentence13: Booking was successful. Reference number is : VZF6OEIK . anything else today? Sentence14: Booking was successful for a train departing at 09:40. The reference number is NJ1GZ4Y0 . Will there be anything else today? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User