Given the task definition and input, reply with output. 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 today? 
 customer: I am Virginia Moore from Orlando. I need your assistance in reserving a flight ticket from Orlando because I have to attend a party in Detroit. Can you please find a flight? 
 agent: Ok, please can I know the dates of your planned journey? 
 customer: Thank you. My planned journey dates are July 07 and July 09. 
 agent: Yes, can you let me know the airport codes of your origin and destination airport codes? 
 customer: Ok, the nearest airports to my locations are MCO and DTW. 
 agent: Please wait a moment while I check. If you have any specification please let me know? 
 customer: Ok, I will wait but make sure that the flight returning time should be in the afternoon. 
 agent: Sure, I will check. 
 customer: Ok.  I need a single connecting flight. Please check for that also. 
 agent: Sorry as per the intents there is no flight which is departing during afternoon timings. 
 customer: It's ok, not a problem. Anyways thank you for your valuable time. 
 agent: Thank you for choosing our agency, I will let you know if there are any flights as per your intents as per now no flight is available for your return timings. 
 customer: Ok. You are most welcome.
no_flight