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 aid you? 
 customer: I want to book a flight ticket from PHL to CLT for attending a event. 
 agent: Sure, please provide your journey dates. 
 customer: My travelling dates are July 18 and July 20. 
 agent: Ok, Do you have any class preference? 
 customer: I am comfortable with any class. 
 agent: Ok, Kindly mention your connection limit. 
 customer: Yes, I prefer to travel in a connecting flight. 
 agent: Ok, Is there any other preferences? 
 customer: No. 
 agent: Thank you for providing details, we did not find any flights with your given details. 
 customer: No worries, thank you for the information. 
 agent: May I know your name? 
 customer: I am George Robinson. 
 agent: Thank you for opting us.
no_flight