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: yes how about a moderate mexican restaurant? Sentence2: I'm not sure if I want to book yet or not, can you confirm the travel time for that one? Sentence3: Thanks that's all I need have a good day. Sentence4: Of course. TR1567 leaves at 17:29 and arrives at 18:07. Sentence5: Okay I have a 17:30 that arrives at 18:07. would you like me to book that for you? Sentence6: Italian would work just as good. Sentence7: I need it for Friday an I'm departing from Cambridge Sentence8: Can you direct me to a Catalan restaurant that is moderately priced please? Sentence9: I am also looking for a train going to Bishops Stortford that leaves after 15:30. Sentence10: The phone number is 01223324033. Sentence11: Okay great, have a good day! Sentence12: No, but could you give me the phone number for Pizza Express? Sentence13: Sorry, but there are no mexican restaurants in the price range either. Would you like to try a different type of restaurant? Sentence14: What day would you be traveling on? Sentence15: Unfortunately, I do not happen to have anything serving catalan food that is moderately priced. Would you like me to check a different cuisine type or price range? Sentence16: Italian is a wonderful choice. There is a pizza express in centre, would you like to make a reservation? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System