Definition: 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: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Michael Lopez. I am planning a trip from DTW to LGA, for my cousin marriage can you help in booking a flight ticket? 
 agent: Sure, may I know your departure day and return day? 
 customer: My date of journey is on 08/22 to 08/24. 
 agent: Yes, there is flight available for you with JetBlue airline and the flight number is 1011. Shall I confirm your ticket? 
 customer: I am interested with that flight, can you confirm ticket for me? 
 agent: Yes, your ticket is booked. Have a safe journey. 
 customer: Thank you for your information. 
 agent: Thank you for choosing us.
Output:
book