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: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Jack Moore. Can you help me in booking a ticket from LAS to JFK? 
 agent: May I know your travel dates please? 
 customer: My planning dates are from 04/06 to 04/08. 
 agent: I am sorry no flights found on your details, thanks for choosing us. 
 customer: It's fine. Anyway, thank you for your help. 
 agent: Most welcome.
A:
no_flight