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

customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Cynthia Thomas, want to travel from EWR to PHL. Will you please help me in booking my ticket? 
 agent: Sure, I'll help you. Please provide your dates. 
 customer: My dates will be from 07/15 to 07/17. 
 agent: I got a flight for you with 1 connection and price is 300. 
 customer: That's great, please proceed with the booking. Can you give me a 100 rupees discount? 
 agent: Sorry, in our agency we don't give any discount. 
 customer: It's ok, no issue. Thank you for your help. 
 agent: Most welcome.
no_flight