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 may I assist you now? 
 customer: Can you please book a ticket from OAK to DFW to attend Sports festival? 
 agent: Sure, I will help you with that. Can you please provide your preferable dates of travelling? 
 customer: My journey dates are Feb 23 and Feb 25. 
 agent: May I know your name to book a flight ticket? 
 customer: I am Rebecca Hernandez. 
 agent: Do you have any connection limit? 
 customer: Yes, I want single connection. 
 agent: Any more specifications do you have? 
 customer: No. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: As per your details, one of the flight 1006 which is providing by American airlines with a fare of 100 and there is a 1 stop, can I confirm your flight ticket booking? 
 customer: Ok, please proceed. 
 agent: Ok, your ticket has been confirmed in economy class. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Output:
book