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: Where will you be departing from? And is there a preferred time you would like to arrive by or leave after? Sentence2: I need a room to be booked for 6 people and 4 nights starting from the same day Sentence3: What's the total travel time for TR5358? Sentence4: Nope. That's all. Bye now. Sentence5: I would suggest bridge guest house. Sentence6: Goos-bye, have a great day. Sentence7: TR5358 will depart the airport at 12:24 and arrive at Cambridge at 12:52. Would you like to book a ticket? Sentence8: I am departing from Stansted Aiport and would like to arrive by 13:30. Sentence9: How many stars would you like? Sentence10: I'd like to find out when a train leaves on Sunday for Cambridge. Sentence11: Does it have free wifi? Sentence12: Thank you for booking and providing the reference number. Sentence13: It doesn't matter. I need it to be located in the south. Sentence14: Booked! Reference number: G6ORAH2J . Sentence15: the travel time is about 28 minutes. Sentence16: Yes. Shall I book for you? How many people? Sentence17: I also need a guesthouse to stay in. Sentence18: Was there anything else I could help you with today? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User