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 assist you today? 
 customer: I am trying to reserve a plane ticket but due to some server issue, I am getting a problem in the process. Can you please find a flight ticket from DFW to DCA? 
 agent: Sure, may I know your name please? 
 customer: Yes, I am Debra Turner. 
 agent: May I know on which dates you are willing to travel? 
 customer: Ok, my planned trip dates are on Mar 09 and return on Mar 11. 
 agent: May I know your class preference please? 
 customer: No. 
 agent: May I know your preferable time for journey? 
 customer: Yes, I want to return in the afternoon time. 
 agent: May I know your connection limit please? 
 customer: I need a single connecting flight. 
 agent: There is a connecting flight of fare 100 with economy class in Hawaiian airline, shall I proceed for booking? 
 customer: Ok, you can proceed with the ticket booking. 
 agent: Your ticket has been confirmed with flight number 1020, depart time is at 6:00 hours on Mar, 09 and return time is at 17:00 hours on Mar, 11. 
 customer: Thank you for your service. 
 agent: You are welcome, have a safe journey.
book