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 help you? 
 customer: I am Jessica Smith. I am planning a trip from PHX to EWR for my uncle anniversary, can you help in finding a flight? 
 agent: Sure, Smith may I know your travelling dates? 
 customer: My date of journey is on 12/08 to 12/10. 
 agent: Yes, I found a flight-1002 with spirit airlines and the price is 100, can I proceed? 
 customer: Proceed with that flight. 
 agent: Ok, your booking is confirmed. 
 customer: Thank you. 
 agent: Thank you for approaching us.
book