Given the task definition and input, reply with output. 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 can I help you? 
 customer: I want to book a flight ticket from SEA to JFK. Could you help me in booking? 
 agent: Sure, I will help you. Can you please share me your travelling dates? 
 customer: My travelling dates are from Mar 18 - 20. 
 agent: Ok, please share me your name. 
 customer: Virginia Jones. 
 agent: Ok, do you have any connection limit? 
 customer: I prefer for connecting flight. 
 agent: Here, I found a flight for you with single connection and class is economy. Shall I proceed for booking? 
 customer: Yes, please proceed. 
 agent: Your ticket is booked with flight number 1010 and airline is UA. 
 customer: Thank you. 
 agent: Welcome, have a safe flight.
book