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: Thank you very much. That is all I need. Bye. Sentence2: Ok. You are booked for 5 seats on TR5874. Wednesday at 09:59. The total is 83 GBP payable at the station. Your Reference number is 8C6ZLYNK . Sentence3: I'd be happy to. Assuming you're departing from Cambridge, what day and time would you like to travel? Sentence4: I'd be happy to reserve your room. How many nights would you like to stay, and how many in your party? And do you need any other information about the location? Sentence5: Yes, I'd like five tickets, please. Sentence6: I am, it is a guesthouse in the north. Would you like to make a reservation? Sentence7: I need to depart on Wednesday. I'll need to arrive by 1245. Sentence8: I have a train leaving cambridge at 9:59 and arriving at london liverpool street at 11:27. Would you like me to book that for you? Sentence9: Thank you for using Cambridge TownInfo centre. Please remember us for all of your future travel needs. Sentence10: Hi, are you familiar with the Avalon hotel? Sentence11: I would love that. Can you book me a room starting on Friday night? Sentence12: I need a train that stops at london liverpool street and should arrive by 12:45, will you book it for me Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User