Detailed Instructions: 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. What type of service do you need from our side? 
 customer: I need a small help from your agency in my flight ticket booking, can you please help me? 
 agent: Sure, can I have your departure and arrival dates of your journey? 
 customer: Thank you and my planned trip dates are 08/10 and 08/12. 
 agent: Ok, what are your source and destination airport codes? 
 customer: My genesis airport code is PHX and I have to land on PHX which is a round trip. 
 agent: Ok, please give me a minute. 
 customer: Ok. 
 agent: The flight 1020 is available in this route with connection limit 1. Shall I proceed with ticket booking? 
 customer: That's perfect, you can book the flight ticket on my name Sandra Edwards. I am so happy with your service, thank you so much for your help. 
 agent: Ok, your ticket is booked with the name Sandra Edwards and the airlines name is AA. 
 customer: Thank you for ticket booking. 
 agent: You are welcome. Thank you for reaching us.
A:
book