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 may I help you? 
 customer: I am Eric Taylor, do you have any direct flight from MCO to PHL? 
 agent: I will check for that, can you please provide me your travelling dates? 
 customer: My travelling dates are 12/06 and 12/08. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, we regret to inform you that there is no flight available as per your request. 
 customer: That's fine, thanks for your help and information. 
 agent: Thank you for approaching us, have a nice day.
A:
no_flight