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, I am Sharon Green. 
 agent: Hello, how may I help you? 
 customer: I would like to celebrate Steampunk festivals with my family at New York, NY - LGA. Will you help me to book a connecting flight? 
 agent: Sure, please share your journey dates? 
 customer: Ok, my journey dates are 10/24 and 10/26. 
 agent: May I know your origin airport code? 
 customer: Sure, Phoenix, PHX is my origin airport code. 
 agent: Do you need any price limit? 
 customer: Yes, I can spend up to 500. 
 agent: Sorry, no flights found on your given dates. 
 customer: Ok, no worries at all. 
 agent: Thank you for choosing us. 
 customer: Thank you.
no_flight