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 may I assist you? 
 customer: I am Michel Garcia. I am planning to visit metropolitan Museum, help me in booking my flight ticket with single connection. 
 agent: Ok, please share your travelling dates? 
 customer: My journey days are from 03/26 to 03/28. 
 agent: Kindly mention airport codes? 
 customer: I would to fly from AZ-PHX to NY-JFK. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Thanks for waiting, no flights found with your request. 
 customer: That's ok, I will find other alternative. Thank you for your kind service. 
 agent: Thanks for choosing us, have a great day.
no_flight