Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello. How can I help you today? 
 customer: I'm Patricia Rodriguez, planning to visit Charlotte. Can you please book me a ticket from DCA to CLT? 
 agent: Please provide me your dates of journey to proceed further. 
 customer: My preferable journey dates are from 07/25 to 07/27. 
 agent: Please wait for a while. 
 customer: Sure, take your own time. 
 agent: Flight 1001 of Frontier airlines is available on your route. 
 customer: Please book my ticket with this flight. 
 agent: Your ticket has been reserved with 1 connection flight. 
 customer: Thank you for booking my ticket. 
 agent: Thank you for reaching us.
Student:
book