You will be given a definition of a task first, then some input of the task.
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

customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: Gary King here, I want to travel from LAX to LAS to meet my friend on her birthday. 
 agent: Ok, Do you need a stopover in between? 
 customer: I need one stopover in between my journey. 
 agent: Please share your travel dates. 
 customer: 10/12 to 10/14. 
 agent: Ok, please wait. There is an UA airline with flight number 1024 is available for you on your requested dates. Shall I proceed with this booking? 
 customer: Yes, you can proceed. 
 agent: Your booking has been done. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Output:
book