Q: 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 Rachel Wilson. 
 agent: Hello, how can I aid you today? 
 customer: Can you help me with a connection flight to Denver, CO-DEN from PA-PHL? 
 agent: Sure, could you provide me your travel dates? 
 customer: I will start my journey from 02/18 and will be returning on 02/20. 
 agent: Ok, please wait a moment I will check and get back to you. 
 customer: Sure. 
 agent: We found  a flight with your requirement, price is 100 with a connection in between the journey. Your ticket is confirmed with Delta airline and flight number is 1006. 
 customer: Thanks for the information. 
 agent: Thanks for reaching us, have a good day. 
 customer: Thank you.
A:
book