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. 
 customer: Myself Ryan Williams. 
 agent: How may I assist you Ryan Williams? 
 customer: I am planning to visit Disney Land with my friends in LAX. Can you book a ticket from LGA? 
 agent: That's great, may I know your journey dates please? 
 customer: My planning dates are from 10/01 to 10/03. 
 agent: Wait a moment please. 
 customer: Ok. 
 agent: Sorry to say, as there is no flight available on your provided dates. 
 customer: It's fine. 
 agent: Is anything else I may assist you? 
 customer: Thank you for your response. No. 
 agent: Ok, thank you for contacting us. 
 customer: You are welcome.
Output:
no_flight