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: That will work, can you reserve 7 seats for us on that train please? Sentence2: I'm going to cambridge and I need a train that leaves on wednesday. Sentence3: Booking was successful. Reference number is : SY83O0SO . Sentence4: What kind of food would you like ? Sentence5: That is all I need, thank you! Sentence6: I would recommend Lovell Lodge on the north side. It is moderately priced and has internet and parking. Sentence7: Where will you be departing from and what time do you need to arrive in Cambridge? Sentence8: I'd like to leave from Standsted sometime after 15:30. Sentence9: I'm sorry I don't need a restaurant, I need to find a hotel that has 2 stars. Sentence10: I was able to book for you. The reference number is DSE7LBCU . Sentence11: Thank you can you help me find a place to eat as well? Sentence12: the TR1342 leaves at 16:24 Sentence13: Have a wonderful stay. Sentence14: That sounds great. Book it for me for 7 people for 4 nights starting from the same day. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System