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
Q: customer: Hi. 
 agent: Hello, how can I be your helping hand today? 
 customer: Can you please avail me a flight ticket with the name of Carolyn Jones? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: Can you please tell me your airport codes? 
 customer: My airport codes are from NY - EWR to TX - DFW. 
 agent: Ok, when you want to return from DFW? 
 customer: I would like to return on 08/22. 
 agent: Ok, kindly mention your start date of the journey? 
 customer: I want to start my journey on 08/20. 
 agent: Ok, please wait a minute. 
 customer: Sure. 
 agent: We found a Delta airline with a halt in between the journey. 
 customer: Please go ahead with the booking. 
 agent: Your ticket has been confirmed with flight number 1001 with fare of 100. 
 customer: Thank you. 
 agent: Thank you for contacting us.
A:
book