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 can I help you? 
 customer: Can you please help me in booking a flight ticket from DCA to ATL? 
 agent: Sure, can you please share me your travelling dates? 
 customer: I would like to travel on Nov 07 and return on Nov 09. 
 agent: Do you have any class preference? 
 customer: No, I am comfortable with any of the class. 
 agent: Do you have any connection limit? 
 customer: I would prefer connecting flight. 
 agent: May I know your name? 
 customer: Myself Nicole Robinson. 
 agent: Sorry, there were no flights with your given details. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.
no_flight