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
Input: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I am planning to for a heritage tour in PHX. Can you book me a ticket from AUS? 
 agent: Sure, can you share me your travelling dates? 
 customer: I will be leaving on Oct 25 and will come back on Oct 27. 
 agent: Do you have any connection limit? 
 customer: I need 1 stop over within my route. 
 agent: Is there any other specifications? 
 customer: No. 
 agent: May I know name please. 
 customer: I am Kevin Phillips. 
 agent: I found a flight with the price of 100 having one connection and economy class. Can I proceed to booking? 
 customer: Fine, please proceed. 
 agent: Your ticket is booked with the flight- 1008. 
 customer: Thanks for your support. 
 agent: Thank you for reaching us.
Output:
book