You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Let me give you an example: 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
The answer to this example can be: Answer: (A) User
Here is why: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

OK. solve this:
Sentence1: sorry, the booking was unsuccessful. can you please choose another day or time slot? Sentence2: I am looking for a restaurant sitar tandoori. Can you give me more information? Sentence3: There are 4 colleges in the west. Churchill college is located at storey's way. It's entrance fee is free. Sentence4: Thanks. I am also looking for a college to visit while I am in town. Sentence5: there are no colleges in the east. can i look somewhere else? Sentence6: How about in a different area? Sentence7: Alright, I've got your reservation booked, reference number is PE2FBNEN . Sentence8: Can you try for 17:00 instead? And if they are available, I need the reference number. Sentence9: Sitar tandoori is a indian restaurant in the east. It is considered expensive. Would you like to make a reservation? Sentence10: Yes. I would like to book a table for 6 at 18:00 on Monday please. Question: Who has spoken the sentence 3? (A) User (B) System
Answer:
Answer: (B) System