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. 
 customer: Sarah Scott here. 
 agent: How may I assist you at this moment? 
 customer: I want to meet my cousin to discuss about his marriage, so please book my ticket from SEA to ATL. 
 agent: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling? 
 customer: My trip dates are 11/30 and 12/02. 
 agent: Please wait a moment to check the flights availability in your route. 
 customer: Sure. 
 agent: We regret to inform you that there are no flights moving to your planned region with your planned dates of travelling. 
 customer: No problem, I will find an alternative way to travel. 
 agent: Thank you for reaching to our services, have a great day. 
 customer: Thank you for the help.
A:
no_flight