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 help you? 
 customer: I would like to travel from DFW to BOS. Can you please help me? 
 agent: Sure, may I know your trip dates please? 
 customer: My trip dates are from 02/08 to 02/10. 
 agent: Do you have any other requirements? 
 customer: My class preference is business class with 1 connection. 
 agent: Can I know your name please? 
 customer: Myself Anna Martinez. 
 agent: Sorry, we regret to inform you that there is no flight available as per your request. 
 customer: It's ok, thank you.
no_flight