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: Hi. 
 agent: Hello, how can I aid you? 
 customer: I want to fly from DEN to DCA. Can you check the flight availability on that route? 
 agent: Sure, can you share your trip dates? 
 customer: Sure, my planned travel dates are 08/31 and 09/02. 
 agent: May I know your name? 
 customer: Daniel Jones here. 
 agent: Do you have any preferences? 
 customer: No specifications, proceed with booking. 
 agent: There is a connecting flight with number 1002 in airline AA, the fare is 100 in economy class. Can I book it? 
 customer: Yes, you can proceed with that booking. 
 agent: Your ticket is reserved. 
 customer: Thank you for the booking. 
 agent: Thank you for opting us.
book