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

Let me give you an example: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
The answer to this example can be: no_reservation
Here is why: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

OK. solve this:
customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: My name is Kimberly Wright. I am planning to book a plane ticket from PHL to IAH. 
 agent: Sure, I can do that for you. Can you please provide me your trip dates? 
 customer: Sure, my trip dates are from 08/22 to 08/24. 
 agent: Ok, please wait for a moment. 
 customer: Ok, take your time. 
 agent: There is a fight available in Southwest airlines and the ticket costs you 100 only. Shall I book the ticket? 
 customer: Ok, please proceed and confirm my reservation. 
 agent: Wright, your ticket is booked successfully with the flight-1017. 
 customer: Thank you. 
 agent: Your are most welcome and thank you for choosing us.
Answer:
book