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: There are three restaurants available. Did you have a price preference? Sentence2: the good luck chinese food takeaway is expensive. the phone number is 01223244149. the address and postcode are 82 Cherry Hinton Road Cherry Hinton cb17ag. anything else? Sentence3: I need a place to dine that serves chinese food and is in the south. Sentence4: That would work perfectly. Can you get me 5 tickets for that train? Sentence5: Your booking was successful and the amount due at the station is 49 GBP. Your reference number is OGXNDTVX . Can I do anything else for you? Sentence6: Wednesday is the day I want, please. Sentence7: What day would you like to travel? Sentence8: Not really. Can I just have the address, postcode, and phone for your favorite? Sentence9: Ok great. Have a great day. Sentence10: We have lots of trains that come in by then. Where are you departing from? Sentence11: Hi there, I'm looking for a train that gets into Cambridge by 09:30 Sentence12: That is all I need. Sentence13: I'm leaving from Kings Lynn. Sentence14: I have a train that gets into Cambridge by 08:58. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User