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 help you today? 
 customer: I would like to meet my childhood friend after a long time in Los Angeles, so I would like to book a flight ticket. Can you help me? 
 agent: Sure, we are here to help you. Can you please share your travel dates? 
 customer: Ok, my trip dates are from Mar 24 to 26. 
 agent: May I know your airport codes? 
 customer: Sure, my locations are from PHX to LAX. 
 agent: Do you have any connection limit? 
 customer: I need a connecting flight with business class. 
 agent: Is there any other specification? 
 customer: I would like to depart in the morning and returning in the evening. 
 agent: Ok, please share your name. 
 customer: Sure, I am Sharon Brown. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Sorry to say, no flights found with your requirement. 
 customer: It's ok, thank you. 
 agent: Thanks for reaching us.
no_flight