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: how about something in the moderate price range? Sentence2: Well I'm really looking for that expensive guesthouse type. How about something in the north with free parking included? Sentence3: Sure, please make a reservation for 2 people 2 nights starting on thursday. Sentence4: Can we make it 1 night then? Sentence5: Thank you for using our service. Sentence6: There are no results for expensive guesthouse in the north. Would you like to try something else? Sentence7: Thank you for assisting me with that. I won't need anything else today. Sentence8: Sorry, the hotel can't accommodate you for that time frame. want to change dates? Sentence9: How about acorn house? I hear it's lovely. Sentence10: I'm sorry there are no results for an expensive guesthouse, would you like to try another type, such as hotel? Sentence11: I am looking for a place to stay. The hotel should be in the expensive price range and should be in the type of guesthouse Sentence12: Booking was successful for one night. Reference number is : FJFV11JA . Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System