You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Your reference number is P5C22QW2 . May I help you with anything else today? Sentence2: Certainly! What day and time would you like to travel? Sentence3: I'll try the Anatolia. Please see if you can get me a table for 2 at 13:45 on Saturday Sentence4: ok there is one leaving at 1600 i will book it for you Sentence5: I would really like some good Turkish food. Sentence6: I want to arrive in broxbourne by 17:15. I am leaving from Cambridge, of course. Sentence7: I also need a train to Broxbourne. Sentence8: There are two Turkish restaurants listed. Anatolia and Efes Restaurant. Would you like to make a reservation for either of these? Sentence9: Please list all moderately priced restaurants in the centre of Cambridge. Sentence10: There are 21 restaurants to choose from. Would you like me to narrow this search down by choosing a type of food you would like to eat? Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System