Teacher: In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
Teacher: Now, understand the problem? If you are still confused, see the following example:
customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Solution: no_reservation
Reason: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

Now, solve this instance: customer: Hello. 
 agent: Hello. 
 customer: I am Edward Anderson. 
 agent: How can I assist you today? 
 customer: I want to book a flight ticket from Los Angeles to San Francisco to meet my grand mother. 
 agent: Sure, can you please share your travel dates? 
 customer: Sure, I intend to depart on Nov 10 and arrive on Nov 12. 
 agent: Could you please help me with airport codes? 
 customer: Sure,  my airport codes are LAX and SFO. 
 agent: Do you have any class preferences? 
 customer: Yes, I need a halt in between the journey. 
 agent: Edward Anderson, there is a flight available with price 100 and the connection is 1 with UA airline. Would you like me to proceed with the booking? 
 customer: You can proceed with booking. 
 agent: Your booking is confirmed with 1019 flight number. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.
Student:
book