Q: 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 can I assist you? 
 customer: I am Melissa Garcia. I want to book a flight ticket from MCO to PHX, can you please help me in flight booking? 
 agent: Sure, May I know your journey dates? 
 customer: I want to fly on Feb 02, return on Feb 04. 
 agent: Ok, do you have any preferences? 
 customer: Yes, my return time should be afternoon. 
 agent: Ok, let me check. 
 customer: Ok. 
 agent: Sorry, we couldn't found any flights. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for connecting us.
A:
no_flight