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: There are 5 trains that meet those requirements. TR5504 would have you arrive by 13:27. Can I help you buy a ticket? Sentence2: If you have no particular requirements, you might like the Autumn House, which is an inexpensive 4 star guest house on the East side. Sentence3: I want to book it for one person, four nights starting on Sunday. Sentence4: Yes it does. Sentence5: Does it include free internet? Sentence6: It doesn't matter, and I don't need internet access. Sentence7: Fantastic! Have a good day. Sentence8: I can't rest yet. I still need a train. I am traveling from Cambridge to London liverpool street. Can you help me out? Sentence9: Booking was successful. Reference number: 9COW8ZI5 . Is there anything else I can help you with? Sentence10: You can rest now, your reference number is BQ8VSRRZ . Is there anything else I can assist you with today? Sentence11: I'm exhausted. Can you find me a guesthouse somewhere on the east side of town? Sentence12: I'd need to leave on thursday and arrive by 14:30. Sentence13: No, that is all, thank you. Sentence14: Absolutely. First, I need a few more details. What day will you be traveling? Sentence15: Yes please for one. I will also need a reference number. Sentence16: Sure. There are both moderate and cheap priced guesthouses in this area. Which would you prefer? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User