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 please book tickets on that train for 7 people and send me the reference number Sentence2: Thank you so much. And yes, I also need to find a train to Bishops Stortford, please. I will be leaving from Cambridge on Tuesday. Sentence3: Your booking was successful, your reference number is WT2VB50O . Sentence4: There are 10 trains to choose from. Do you have a preferred time to leave after or arrive by? Sentence5: You're welcome and enjoy your trip. Sentence6: I want it to arrive by 16:00. Sentence7: De Luca is a moderately-priced Modern European place at 83 Regent Street in the center of town. Would you like to book a table there? Sentence8: Hello, what can you tell me about de luca cucina and bar? Sentence9: Yes, I need it booked for 7 people on Tuesday at 19:30. Sentence10: You are all set! Your table will be reserved for 15 minutes. Your reference number is 5R3GSQVS . Do you need anything else? Sentence11: There are 5 trains matching your query. The latest arrives by 14:07. Do you want to book it? Sentence12: Thank you thats all I need for now. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System