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: El shaddai is a cheap guesthouse with free wifi and parking. Does this suit your needs? Sentence2: Ok how about a cheap priced hotel, free wifi would be a plus. Sentence3: Sorry, still zero matches. Perhaps some other criteria? Sentence4: Yeah. Can you help me book it please? It'll be for 8 people Sentence5: How many days will you be staying, and what day will you be arriving? Sentence6: Here is the address for your hotel 41 warkworth street postcode cb11eg. Have a great day! Sentence7: No thank you, that is all the info I needed. Have a great day! Sentence8: I am looking for a place to stay. The hotel should be in the expensive price range and should have a star of 0 Sentence9: Booking was successful. Reference number is : E69CNU30 . Is there anything else I can help you with? Sentence10: 2 nights for 8 people starting on sunday. Sentence11: Unfortunately I am not finding any hotels matching your criteria, would you like me to look for three star hotels? Sentence12: how about a star of 0? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System