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: Looking for a train that leaves on saturday Sentence2: TR1958 leaves at 8:40 - would you like tickets on that train? Sentence3: Leaving Birmignham New Street, to Cambridge. Sentence4: Oh, bummer. How about 20:00? Sentence5: You're welcome. Have an awesome day. Sentence6: I would need to leave after 08:30. Sentence7: Not yet.. just needed the ID. Also, looking for a place to dine in the center of town at a moderate price range. Sentence8: That works for me. Book it for 3 people at 21:00 on the same day. Sentence9: That worked! Your reference number is WASWNFH0 . Sentence10: Thank you. That is all. Sentence11: I have many delicious options. How does Cotto sound? It's British food. Sentence12: Unfortunately, there is no availability for that time. Did you have a different time in mind? Sentence13: No problem. Any preference on times? Sentence14: Yes, there are 404 trains. Would you like to tell me more to narrow your search? Question: Who has spoken the sentence 7? (A) User (B) System
Answer:
Answer: (B) System