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
Q: customer: Hi. 
 agent: Hello, how may I assist you? 
 customer: Can you please help me in booking a normal cost airline ticket? 
 agent: Sure, may I know your planned travel dates please? 
 customer: My travel dates are in the month of June from 15th to 17th. 
 agent: Can you please share your airport codes? 
 customer: My airport codes are from SEA to LGA. 
 agent: Do you have any airline preferences? 
 customer: I have already mentioned above. 
 agent: Would you like to travel in a connecting flight or a direct flight? 
 customer: I like to travel in a connecting flight. 
 agent: Do you have any other preferences? 
 customer: No, thanks for asking. 
 agent: May I know your good name please? 
 customer: Sure, Stephen Wright here. 
 agent: Sorry, there is no flight available in this route. 
 customer: That's ok, thank you for checking. 
 agent: You are welcome.
A:
no_flight