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? 
 customer: I am Justin Lee. Can you help booking a flight ticket from LGA to ATL? 
 agent: Sure, may I know your planned travel dates please? 
 customer: I will start on 01/03 and return on 01/05. 
 agent: Would you like to travel in a connecting flight or a direct flight? 
 customer: I am comfortable with any flight. 
 agent: Do you have any other specifications? 
 customer: I need to depart in the morning time. 
 agent: Sorry, there is no flight available on your requested dates. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.
no_flight