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: Hi. How can I help you? 
 customer: Myself Linda Nelson. I want to attend my cousin's marriage.I just want to book a ticket. 
 agent: Sure, please provide me your details? 
 customer: My airport codes are from NY-EWR to NC-CLT. 
 agent: May I know you dates please? 
 customer: My trip dates are from 03/11 to 03/13. 
 agent: Delta airlines is matching your needs with 1001 fight number. Can I confirm your booking? 
 customer: Ok, please book my ticket. 
 agent: Your ticket was confirmed. 
 customer: Thank you. 
 agent: Thank you.
Output:
book