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: Hi. 
 agent: Hello. How could I support you today? 
 customer: Could you please book a flight ticket from EWR to SEA as I want to attend a pioneer festival? 
 agent: Sure, I am happy to help you in booking. 
 customer: Thank you. 
 agent: Will you please let me know your planned trip dates? 
 customer: My trip dates are Oct 19 and Oct 21. 
 agent: Is there any other requirements? 
 customer: I need a single connecting flight. 
 agent: May I know your name please for documentation purpose? 
 customer: My name is Paul Carter. 
 agent: There is a flight found with an Spirit airline of flight 1018 in an economy class with single connection. Shall I proceed with the booking? 
 customer: Yes, proceed. 
 agent: Your ticket has been confirmed. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.
Output:
book