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 may I aid you? 
 customer: I am Eric Jackson. Can you help me in booking from DEN to CLT, as there is a business meeting? 
 agent: I am here to help you about your flight ticket booking. Can you please provide your planned dates of journey? 
 customer: My trip dates are 07/29 to 07/31. 
 agent: I found a flight in Spirit airlines with a ticket fare of 100 and there is a 1 stop and go in your trip in 1016 flight, can I proceed with ticket booking? 
 customer: You can reserve it. 
 agent: I have booked your flight ticket successfully. 
 customer: Thank you for helping. 
 agent: Most welcome, thank you for choosing our service.
book