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 today? 
 customer: I am David Adams. Can you help me to book a flight ticket from CLT to LGA? 
 agent: Sure, can you confirm your travel dates? 
 customer: My travelling dates are 23 and 25 of June. 
 agent: Do you have any another specifications? 
 customer: I need a connecting flight. 
 agent: United Airlines providing the ticket for you, the fare is 100 and connection limit 1. Would you like me to make the booking now? 
 customer: Please proceed to booking. 
 agent: Your ticket reservation done with the flight number 1010. 
 customer: Thanks for helping me. 
 agent: Welcome, have a great journey.
book