Definition: 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. What can I do for you? 
 customer: I am planning to attend a dance competition in IAH from AUS. Can you find a ticket for me? 
 agent: Sure, I would like to know your travel dates for booking? 
 customer: Sure, I am planning to travel on 01/04 to 01/06. 
 agent: Happy to say this, I found Delta airline with 1 connection to attend dance competition. Can I proceed for booking? 
 customer: Ok, make sure that the price should be 200. 
 agent: Your ticket is confirmed with flight number 1005, with price 100. May I know your name? 
 customer: Yes, I am Betty Lewis. 
 agent: Betty Lewis, thank you for contacting us. 
 customer: Thank you for spending your valuable time. 
 agent: Have a good day.
Output:
book