Instructions: 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
Input: customer: Hi. 
 agent: Hello. How may I help you? 
 customer: Can you please help me in booking a flight tikcet to LAS from SEA? 
 agent: Sure, may I know your trip dates? 
 customer: My travel dates are from Dec 31 to Jan 02. 
 agent: Do you have any other requirements? 
 customer: I need a connecting flight. 
 agent: Can I know your name please? 
 customer: I am Samantha Garcia. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Thank you for waiting and we have found a flight in economy class with 1 connection in Delta airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: You can proceed with booking. 
 agent: Ok, your ticket is booked with the flight number 1029. 
 customer: Thank you. 
 agent: Most welcome.
Output:
book