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
Problem:customer: hello,. 
 agent: Hello. 
 customer: I am Gary Rodriguez. 
 agent: How may I render you today? 
 customer: I need to book my flight ticket to Denver, DEN to attend a event. 
 agent: Ok. 
 customer: Will you help me in booking me a flight ticket from Atlanta, ATL? 
 agent: Sure, I will assist you in booking a flight ticket. 
 customer: Thank you. 
 agent: Please send me the trip dates. 
 customer: 02/04 - 02/06 are my willing dates for travel. 
 agent: Do you have any other requirements? 
 customer: I need a halt in between my travel. 1000 is the budget. 
 agent: Ok, Thanks for sharing your details. But no flights found in search. 
 customer: Ok, I will choose other airline. 
 agent: Thanks for availing us, Have a nice day. 
 customer: Thank you for quick response.
Solution:
no_flight